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product structure silicon monolithic integrated circuit this product ha s no designed protection against radioactive rays 1/ 46 www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 14 ? 001 tsz02201-0j3j0aj00090-1-2 02.oct.2014 rev.003 synchronous buck converter with integrated fet bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn general description the (bd9106fvm, bd9107fvm, bd9109fvm, bd9110nv, and bd9120hfn ) are rohms high efficiency step-down switching regulators designed to produce a voltage as low as 1v from a supply voltage of 3.3v or 5.0v. it offers high efficiency by using synchronous switches and provides fast transient response to sudden load changes by implementing current mode control. features ? fast transient response because of current mode control system ? high efficiency for all load ranges because of synchronous switches (nch and pch fet) and sllm tm (simple light load mode) ? soft-start function ? thermal shutdown and ulvo functions ? short-circuit protection with time delay function ? shutdown function application power supply for lsi including dsp, microcomputer and asic typical application circuit key specifications ? i nput voltage range bd9120hfn: 2.7v to 4.5v bd9106fvm, bd9107fvm: 4.0v to 5.5v bd9109fvm, bd9110nv: 4. 5v to 5.5v ? output voltage range bd9109fvm: 3.30v 2% bd9120hfn: 1.0v to 1.5v bd9107fvm: 1.0v to 1.8v bd9106fvm, bd9110nv: 1.0v to 2.5v ? output current bd9106fvm, bd9109fvm, bd9120hfn: 0.8a(max) bd9107fvm: 1.2a(max) bd9110nv: 2.0a(max) ? switching frequency: 1mhz(typ) ? fet on-resistance pch (typ) / nch(typ) bd9110nv: 200m / 150m bd9106fvm, bd9107fvm: 350m / 250m bd9120hfn, bd9109fvm: 350m / 250m ? standby current: 0 a(typ) ? operating temperature range bd9110nv: - 25 c to + 10 5 c bd9120hfn, bd9106fvm: - 25 c to +85c bd9107fvm, bd9109fvm: - 25 c to +85c packages w(typ) x d(typ) x h(max) figure 1. typical application circuit hson8 2.90mm x 3.00mm x 0.60mm msop8 2.90mm x 4.00mm x 0.90mm son008v5060 5.00mm x 6.00mm x 1.00mm gnd,pgnd sw vcc,pvcc en vout ith v cc c in r ith c ith l c o r 2 v out r 1 datashee t downloaded from: http:///
datas heet 2/ 46 bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 tsz02201-0j3j0aj00090-1-2 02.oct.2014 rev.003 pin configuration pin description bd9106fvm, bd9107fvm, bd9109fvm pin no. pin name function 1 adj/vout ou tput voltage detection pin / adj for bd9106 ? 07fvm 2 ith gm amp output pin/connected to phase compensation capacitor 3 en enable pin(active high) 4 gnd ground pin 5 pgnd power switch ground pin 6 sw power switch node 7 pv cc power switch supply pin 8 v cc power supply input pin bd9110nv pin no. pin name function 1 adj output voltage detection pin 2 v cc power supply input pin 3 ith gm amp output pin/connected to phase compensation capacitor 4 gnd ground pin 5 pgnd power switch ground pin 6 sw power switch node 7 pv cc power switch supply pin 8 en enable pin(active high) bd9120hfn pin no. pin name function 1 adj output voltage detection pin 2 ith gm amp output pin/connected to phase compensation capacitor 3 en enable pin(active high) 4 gnd ground pin 5 pgnd power switch ground pin 6 sw power switch node 7 pv cc power switch supply pin 8 v cc power supply input pin 8 v cc 7 pvcc 6 sw 5 pgnd 1 adj 2 ith 3 en 4 gnd figure 2. bd9106fvm, bd9107fvm 8 v cc 7 pv cc 6 sw 5 pgnd 1 vout 2 ith 3 en 4 gnd figure 3. bd9109fvm figure 4. bd9110nv figure 5. bd9120hfn (top view) (top view) adj ith en gnd v cc pv cc sw pgnd 8 1 2 3 4 5 6 7 (top view) adj 1 v cc 2 ith 3 gnd 4 8 en 7 pv cc 6 sw 5 pgnd (top view) downloaded from: http:///
datas heet 3/ 46 bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 tsz02201-0j3j0aj00090-1-2 02.oct.2014 rev.003 lineup operating temperature range i nput voltage range out put voltage range output current max uvlo threshold voltage typ package available part number - 25 c to +85 c 4.0v to 5.5v adjustable (1.0v to 2.5v) 0.8a 3.4v msop8 reel of 30 00 bd9106fvm- tr adjustable (1.0v to 1.8v) 1.2a 2.7v msop8 reel of 30 00 bd9107f vm - tr 4.5v to 5.5v 3.302% 0.8a 3.8v msop8 reel of 30 00 bd9 10 9f vm - tr 2.7v to 4.5v adjustable (1.0v to 1.5v) 0.8a 2.5v hson8 reel of 30 00 bd9120hfn- tr - 25 c to +105 c 4.5v to 5.5v adjustable (1.0v to 2.5v) 2.0a 3.7v son00 8v5060 reel of 20 00 bd9110nv- e2 absolute maximum ratings (ta=25 c ) parameter symbol limit u nit bd910xfvm bd9110nv bd9120hfn v cc voltage v cc -0.3 to +7 (note 1) -0.3 to +7 (note 1) -0.3 to +7 (note 1) v pv cc voltage pv cc -0.3 to +7 (note 1) -0.3 to +7 (note 1) -0.3 to +7 (note 1) v en voltage v en -0.3 to +7 -0.3 to +7 -0.3 to +7 v sw , it h voltage v sw ,v ith -0.3 to +7 -0.3 to +7 -0.3 to +7 v power dissipation 1 pd1 0.38 (note 2) 0.64 (note 4) 0.63 (note 6) w power dissipation 2 pd2 0.58 (note 3) 5.29 (note 5) 1. 75 (note 7) w operating temperature range topr - 25 to +85 - 25 to +105 - 25 to +85 c storage temperature range tstg - 55 to +150 - 55 to +150 - 55 to +150 c maximum junction temperature tjmax +150 +150 +150 c (note 1 ) pd should not be exceeded. (note 2 ) ic only (note 3 ) 1-layer. mounted on a 70mm x 70mm x 1.6mm glass-epoxy board (note 4 ) ic only (note 5) 4-layer. mounted on a 74.2mm x 74.2mm x 1.6mm glass-epoxy board, area of copper foil in 1st layer : 5505mm 2 (note 6) 1-layer. mounted on a 74.2mm x 74.2mm x 1.6mm glass-epoxy board, area of copper foil : 0.2% (note 7) 1-layer. mounted on a 74.2mm x 74.2mm x 1.6mm glass-epoxy board, area of copper foil : 65% caution: operating the ic over the absolute maximum ratings may damage the ic. the damage can either be a s hort circuit between pins or an open circuit between pins and the internal circuitry. therefore, it is important to consider circui t protection measures, such as adding a fuse, in case the ic is operated over the absolute maximum ratings. recommended operating conditions (ta=25 c ) parameter symbol bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn unit min max min max min max min max min max v cc voltage v cc (note 8) 4.0 5.5 4.0 5.5 4.5 5.5 4.5 5.5 2.7 4.5 v pv cc voltage pv cc (note 8) 4.0 5.5 4.0 5.5 4.5 5.5 4.5 5.5 2.7 4.5 v en voltage v en 0 v cc 0 v cc 0 v cc 0 v cc 0 v cc v sw average output current i sw (note 8) - 0.8 - 1.2 - 0.8 - 2.0 - 0.8 a (note 8) pd should not be exceeded. downloaded from: http:///
datas heet 4/ 46 bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 tsz02201-0j3j0aj00090-1-2 02.oct.2014 rev.003 electrical characteristics bd9106fvm (ta=25c , v cc =5v, v en =v cc , r 1 =20k, r 2 =10k unless otherwise specified.) parameter symbol min typ max unit conditions standby current i stb - 0 10 a en=gnd bias current i cc - 250 400 a en low voltage v enl - gnd 0.8 v standby mode en high voltage v enh 2.0 v cc - v active m ode en input current i en - 1 10 a v en =5v oscillation frequency f osc 0.8 1 1.2 mhz pch fet on-resistance (note 9) r onp - 0.35 0.60 pv cc =5v nch fet on-resistance (note 9) r onn - 0.25 0.50 pv cc =5v adj voltage v adj 0.780 0.800 0.820 v output voltage (note 9) v out - 1.200 - v ith sink current i thsi 10 20 - a adj=h ith source current i thso 10 20 - a adj=l uvlo threshold voltage v uvloth 3.2 3.4 3.6 v v cc =h to l uvlo hysteresis voltage v uvlohys 50 100 200 mv sof t start time t ss 1.5 3 6 ms timer latch time t latch 0.5 1 2 ms (note 9) design guarantee outgoing inspection is not done on all products bd9107fvm (ta=25c , v cc =5v, v en =v cc , r 1 =20k, r 2 =10k unless otherwise specified.) parameter symbol min typ max unit conditions standby current i stb - 0 10 a en=gnd bias current i cc - 250 400 a en low voltage v enl - gnd 0.8 v standby mode en high voltage v enh 2.0 v cc - v active m ode en input current i en - 1 10 a v en =5v oscillation frequency f osc 0.8 1 1.2 mhz pch fet on-resistance (note 9) r onp - 0.35 0.60 pv cc =5v nch fet on-resistance (note 9) r onn - 0.25 0.50 pv cc =5v adj voltage v adj 0.780 0.800 0.820 v output voltage (note 9) v out - 1.200 - v ith sink current i thsi 10 20 - a v out =h ith s our ce current i thso 10 20 - a v out =l uvlo threshold voltage v uvloth 2.6 2.7 2.8 v v cc =h to l uvlo hysteresis voltage v uvlohys 150 300 600 mv soft start time t ss 0.5 1 2 ms timer latch time t latch 0.5 1 2 ms (note 9) design guarantee outgoing inspection is not done on all products bd9109fvm (ta=25c , v cc =pv cc =5v, v en = v cc unless otherwise specified.) parameter symbol min typ max unit conditions standby current i stb - 0 10 a en=gnd bias current i cc - 250 400 a en low voltage v enl - gnd 0.8 v st andby mode en high voltage v enh 2.0 v cc - v active m ode en input current i en - 1 10 a v en =5v oscillation frequency f osc 0.8 1 1.2 mhz pch fet on-resistance (note 9) r onp - 0.35 0.60 pv cc =5v nch fet on-resistance (note 9) r onn - 0.25 0.50 pv cc =5v output volta ge (note 9) v out 3.234 3.300 3.366 v ith sink current i thsi 10 20 - a v out =h ith source current i thso 10 20 - a v out =l uvlo threshold voltage v uvlo1 3.6 3.8 4.0 v v cc =h to l uvlo hysteresis voltage v uvlo2 3.65 3.9 4.2 v v cc =l to h sof t start time t ss 0.5 1 2 ms timer latch time t latch 1 2 3 ms scp/tsd operated output short circuit threshold voltage v scp - 2 2.7 v v out =h to l (note 9) design guarantee outgoing inspection is not done on all products downloaded from: http:///
datas heet 5/ 46 bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 tsz02201-0j3j0aj00090-1-2 02.oct.2014 rev.003 electrical characteristics C continued bd9110nv (ta=25c , v cc =pv cc =5v, v en =v cc , r 1 =10k,r 2 =k unless otherwise specified.) parameter symbol min typ max unit conditions standby current i stb - 0 10 a en=gnd bias current i cc - 250 350 a en low voltage v enl - gnd 0.8 v standby mode en high voltage v enh 2.0 v cc - v active m ode en input current i en - 1 10 a v en =5v oscillation frequency f osc 0.8 1 1.2 mhz pch fet on-resistance (note 9) r onp - 200 320 m pv cc =5v nch fet on-resistance (note 9) r onn - 150 270 m pv cc =5v adj voltage v adj 0.780 0.800 0.820 v output voltage (note 9) v out - 1.200 - v ith sink current i thsi 10 20 - a v out =h ith source current i thso 10 20 - a v out =l uvlo threshold voltage v uvloth 3.5 3.7 3.9 v v cc =h to l uvlo hysteresis voltage v uvlohys 50 1 00 200 mv soft start time t ss 2.5 5 10 ms timer latch time t latch 0.5 1 2 ms (note 9) design guarantee outgoing inspection is not done on all products bd9120hfn (ta=25c , v cc =pv cc =3.3v, v en =v cc , r 1 =20k, r 2 =10k unless otherwise specified.) parameter symbol min typ max unit conditions standby current i stb - 0 10 a en=gnd bias current i cc - 200 400 a en low voltage v enl - gnd 0.8 v standby mode en high voltage v enh 2.0 v cc - v active m ode en input current i en - 1 10 a v en =3.3v oscillatio n frequency f osc 0.8 1 1.2 mhz pch fet on-resistance (note 9) r onp - 0.35 0.60 pv cc =3.3v nch fet on-resistance (note 9) r onn - 0.25 0.50 pv cc =3.3v adj voltage v adj 0.780 0.800 0.820 v output voltage (note 9) v out - 1.200 - v ith sink current i th si 10 20 - a v out =h ith source current i thso 10 20 - a v out =l uvlo threshold voltage v uvlo1 2.400 2.500 2.600 v v cc =h to l uvlo hysteresis voltage v uvlo2 2.425 2.550 2.700 v v cc =l to h soft start time t ss 0.5 1 2 ms timer latch time t latch 1 2 3 ms scp/tsd operated output short circuit threshold voltage v scp - v out x0.5 v out x0.7 v v out =h to l (note 9) design guarantee outgoing inspection is not done on all products downloaded from: http:///
datas heet 6/ 46 bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 tsz02201-0j3j0aj00090-1-2 02.oct.2014 rev.003 block diagram bd9106fvm, bd9107fvm bd9109fvm figure 6. bd9106fvm, bd9107fvm block diagram figure 7. bd9109fvm block diagram vcc pvcc vcc vref vcc pvcc vcc vref vout downloaded from: http:///
datas heet 7/ 46 bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 tsz02201-0j3j0aj00090-1-2 02.oct.2014 rev.003 bd9110nv bd9120hfn figure 8. bd9110nv block diagram figure 9. bd9120hfn block diagram vcc pvcc vcc vref vcc vcc pvcc downloaded from: http:///
datas heet 8/ 46 bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 tsz02201-0j3j0aj00090-1-2 02.oct.2014 rev.003 typical performance curves bd9106fvm figure 11 . output voltage vs en voltage output voltage: v out [v] en voltage: v en [v] figure 10 . output voltage vs input voltage output voltage : v out [v] input voltage: v cc [v] [v out =1.8v] ta=25c i o =0a figure 12 . output voltage vs output current output voltage: v out [v] output current: i out [a] v cc =5v ta=25c [v out =1.8v] v cc =5v ta=25c i o =0a [v out =1.8v] figure 13. output voltage vs temperature output voltage: v out [v] temperature: ta [c] v cc =5v i o =0a [v out =1.8v] downloaded from: http:///
datas heet 9/ 46 bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 tsz02201-0j3j0aj00090-1-2 02.oct.2014 rev.003 typical performance curves C continued figure 17. en voltage vs temperature en voltage: v en [v] temperature: ta [c] figure 15. frequency vs temperature frequency: f osc [mhz] temperature: ta [c] v cc =5v v cc =5v figure 14. efficiency vs output current efficiency: [%] output current: i out [ma] v cc =5v ta=25c [v out =1.8v] figure 16 . on -resistance vs temperature on -resistance: r on [ ] temperature: ta [c] v cc =5v nmos pmos downloaded from: http:///
datas heet 10 / 46 bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 tsz02201-0j3j0aj00090-1-2 02.oct.2014 rev.003 typical performance curves C continued typical waveforms ] figure 19. frequency vs input voltage frequency: f osc [mhz] input voltage: v cc [v] figure 20 . soft start waveform figure 18. circuit current vs temperature circuit current: i cc [a] temperature: ta [c] v cc =5v v cc =5v ta=25c i o =0a v out [v out =1.8v] v cc =pv cc =en figure 21 . sw waveform ( i o =10ma) v cc =5v ta=25c v out sw v out =1.8v] [sllm control downloaded from: http:///
datas heet 11 / 46 bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 tsz02201-0j3j0aj00090-1-2 02.oct.2014 rev.003 typical waveforms C continued figure 23. transient response (i o =100ma to 00ma, 10s) figure 22 . sw waveform (i o = 20 0ma) v cc =5v ta=25c v out =1.8v] [pwm control v out sw v cc =5v ta=25c v out i out [v out =1.8v] v out i out v cc = 5v ta=25c figure 2 4. transient response (io=600ma to 100ma, 10s) [v out =1.8v] v out i out downloaded from: http:///
datas heet 12 / 46 bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 tsz02201-0j3j0aj00090-1-2 02.oct.2014 rev.003 typical performance curves bd9107fvm figure 27. output voltage vs output current output voltage: v out [v] output current: i out [a] v cc =5v ta =25c [v out =1.5v] figure 25. output voltage vs input voltage output voltage: v out [v] input voltage: v cc [v] [v out =1.5v] ta=25c i o =0a figure 26. output voltage vs en voltage output voltage: v out [v] en voltage: v en [v] v cc =5v ta=25c i o =0a [v out =1.5v] figure 28. output voltage vs temperature output voltage: v out [v] temperature: ta [c] v cc =5v i o =0a [v out =1.5v] downloaded from: http:///
datas heet 13 / 46 bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 tsz02201-0j3j0aj00090-1-2 02.oct.2014 rev.003 typical performance curves C continued figure 30 . frequency vs temperature frequency: f osc [mhz] temperature: ta [c] v cc =5v figure 32. en voltage vs temperature en voltage: v en [v] temperature: ta [c] v cc =5v figure 29. efficiency vs output current efficiency: [%] output current: i out [ma] v cc =5v ta=25c [v out =1.5v] figure 31. on -resistance vs temperature on -resistance: r on [ ] temperature: ta [c] v cc =5v pmos nmos downloaded from: http:///
datas heet 14 / 46 bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 tsz02201-0j3j0aj00090-1-2 02.oct.2014 rev.003 typical performance curves C continued typical waveforms figure 34. frequency vs input voltage frequency: f osc [mhz] input voltage: v cc [v] figure 35 . soft start waveform figure 33. circuit current vs temperature circuit current: i cc [ a] temperature: ta [c] v cc =5v v out =1.5v] figure 36 . sw waveform ( i o =10ma) v cc =5v ta=25c v out sw v out =1.5v] v cc =5v ta=25c i o =0a [v out =1.5v] v cc =pv cc =en v out [sllm control downloaded from: http:///
datas heet 15 / 46 bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 tsz02201-0j3j0aj00090-1-2 02.oct.2014 rev.003 typical waveforms C continued figure 37 . sw waveform (i o = 50 0ma) v cc =5v ta=25c v out =1.5v] [pwm control v out sw figure 38. transient response (i o =100ma to 00ma, 10s) v cc =5v ta=25c [v out =1.5v] v out i out figure 39. transient response (i o =00ma to 100ma, 10s) v cc =5v ta=25c [v out =1.5v] v out i out downloaded from: http:///
datas heet 16 / 46 bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 tsz02201-0j3j0aj00090-1-2 02.oct.2014 rev.003 typical performance curves bd9109fvm f ig ure 41. output voltage vs en voltage output voltage: v out [v] en voltage: v en [v] v cc =5v ta=25c i o =0a figure 43. output voltage vs temperatu re output voltage: v out [v] temperature: ta [c] v cc =5v i o =0a figure 42. output voltage vs output current output voltage: v out [v] output current: i out [a] v cc =5v ta=25c figure 40 . output voltage vs input voltage output voltage: v out [v] input voltage: v cc [v] ta=25c i o =0a downloaded from: http:///
datas heet 17 / 46 bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 tsz02201-0j3j0aj00090-1-2 02.oct.2014 rev.003 typical performance curves C continued figure 44. efficiency vs output current efficiency: [%] output current: i out [ma] v cc =5v ta=25c figure 45. frequency vs temperature frequency: f osc [mhz] temperature: ta [c] v cc =5v figure 47. en voltage vs temperature temperature: ta [c] en voltage: v en [v] v cc =5v figure 46. on -resistance vs temperature on -resistance: r on [ ] temperature: ta [c] v cc =5v pmos nmos downloaded from: http:///
datas heet 18 / 46 bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 tsz02201-0j3j0aj00090-1-2 02.oct.2014 rev.003 typical performance curves C continued typical waveforms figure 49. frequency vs input voltage frequency: f osc [mhz] input voltage: v cc [v] figure 50 . soft start waveform figure 48. circuit current vs temperature circuit current: i cc [ a] temperature: ta [c] v cc =5v v out v cc =pv cc =en figure 51. sw waveform ( i o =10ma) v cc =5v ta=25c v out sw [sllm control] downloaded from: http:///
datas heet 19 / 46 bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 tsz02201-0j3j0aj00090-1-2 02.oct.2014 rev.003 typical waveforms C continued figure 54. transient response (i o =00ma to 100ma, 10s) v cc =5v ta=25c v out i out figure 52 . sw waveform (i o = 500 ma ) v cc =5v ta=25c v out sw [pwm control] figure 53. transient response (i o =100ma to 00ma, 10s) v cc =5v ta=25c v out i out downloaded from: http:///
datas heet 20 / 46 bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 tsz02201-0j3j0aj00090-1-2 02.oct.2014 rev.003 typical performance curves bd9110nv v cc =5v i o =0a figure 55. output voltage vs input voltage output voltage: v out [v] input voltage: v cc [ v] [v out =1.4v] ta=25c i o =0a figure 56. output voltage vs en voltage output voltage: v out [v] en voltage: v en [v] v cc =5v ta=25c i o =0a [v out =1.4v] figure 57. output voltage vs output current output voltage: v out [v] output current: i out [a] v cc =5v ta=25c [v out =1.4v] figure 58. output voltage vs temperature output voltage: v out [v] temperature: ta [c] [v out =1.4v] v cc =5v i o =0a downloaded from: http:///
datas heet 21 / 46 bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 tsz02201-0j3j0aj00090-1-2 02.oct.2014 rev.003 typical performance curves C continued figure 61. on -resistance vs temperature on -resistance: r on [ ] temperature: ta [c] en voltage: v en [v] figure 62. en voltage vs temperature temperature: ta [c] v cc =5v en voltage : v en [v] figure 59 . efficiency vs output current efficiency: [%] output current: i out [ma] figure 60 . frequency vs temperature frequency: f osc [mhz] temperature: ta [c] v cc =5v v cc =5v ta=25c [v out =1.4v] v cc =5v pmos nmos downloaded from: http:///
datas heet 22 / 46 bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 tsz02201-0j3j0aj00090-1-2 02.oct.2014 rev.003 typical performance curves C continued typical waveforms figure 63. circuit current vs temperature circuit current: i cc [ a] temperature: ta [c] figure 65. soft start waveform figure 66. sw waveform ( i o =10ma) v cc =5v figure 64. frequency vs input voltage frequency: f osc [mhz] input voltage: v cc [v] ta=25c v cc =5v ta=25c i o =0a v cc =pv cc =en v out [v out =1.4v] v cc =5v ta=25c v out sw v out =1.4v] [sllm control downloaded from: http:///
datas heet 23 / 46 bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 tsz02201-0j3j0aj00090-1-2 02.oct.2014 rev.003 typical waveforms C continued figure 68. transient response (i o =100ma to 00ma, 10s) figure 69. transient response (i o =00ma to 100ma, 10s) v cc =5v ta=25c [v out =1.4v] v out i out v cc =5v ta=25c i out v out [v out =1.4v] figure 67 . sw waveform ( i o = 50 0ma) v cc =5v ta=25c v out sw v out =1.4v] [pwm control downloaded from: http:///
datas heet 24 / 46 bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 tsz02201-0j3j0aj00090-1-2 02.oct.2014 rev.003 typical performance curves bd9120hfn v cc figure 73. output voltage vs temperature output voltage: v out [v] temperature: ta [c] [v out =1.5v] v cc =3.3v i o =0a figure 71. output voltage vs en voltage output voltage: v out [v] en voltage: v en [v] v cc =3.3v ta=25c i o =0a [v out =1.5v] figure 72. output voltage vs output current output voltage: v out [v] output current: i out [a] v cc =3.3v ta=25c [v out =1.5v] f ig ure 70 . output voltage vs input voltage output voltage: v out [v] input voltage: v cc [v] [v out =1.5v] ta=25c i o =0a downloaded from: http:///
datas heet 25 / 46 bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 tsz02201-0j3j0aj00090-1-2 02.oct.2014 rev.003 typical performance curves C continued figure 75. frequency vs temperature frequency: f osc [mhz] temperature: ta [c] v cc =3.3v figure 77 . en voltage vs temperature en voltage: v en [v] temperature: ta [c] v cc =3.3v figure 74. efficiency vs output current efficiency: [%] output current: i out [ma] v cc =3.3v ta=25c [v out =1.5v] figure 76. on -resistance vs temperature on -resistance: r on [ ] temperature: ta [c] v cc =3.3v pmos nmos downloaded from: http:///
datas heet 26 / 46 bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 tsz02201-0j3j0aj00090-1-2 02.oct.2014 rev.003 typical performance curves C continued typical waveforms figure 79 . frequency vs input voltage frequency: f osc [mhz] input voltage: v cc [v] figure 81. sw waveform ( i o =10ma) figure 78. circuit current vs temperature circuit current: i cc [ a] temperature: ta [c] v cc =3.3v v cc =3.3v ta=25c i o =0a ta=25c v cc =3.3v ta=25c v out =1.5v] [sllm control v out sw figure 80 . soft start waveform [v out =1.5v] v cc =pv cc =en v out v cc =3.3v ta=25c i o =0a downloaded from: http:///
datas heet 27 / 46 bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 tsz02201-0j3j0aj00090-1-2 02.oct.2014 rev.003 typical waveforms C continued figure 82 . sw waveform ( i o = 20 0ma) figure 84. transient response (i o =00ma to 100ma, 10s) v cc =3.3v ta=25c v out i out [v out =1.5v] figure 83. transient response (i o =100ma to 00ma, 10s) v out i out v cc =3.3v ta=25c [v out =1.5v] v cc =3.3v ta=25c v out sw v out =1.5v] [pwm control downloaded from: http:///
datas heet 28 / 46 bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 tsz02201-0j3j0aj00090-1-2 02.oct.2014 rev.003 application information 1. operation bd9106fvm, bd9107fvm, bd9109fvm, bd9110nv, and bd9120hfn are synchronous step-down switching regulators that achieve fast transient response by employing current mode pwm control system. they utilize switching operation either in pwm (pulse width modulation) mode for heavier load, or sllm tm (simple light load mode) operation for lighter load to improve efficiency. (1) synchronous rectifier integrated synchronous rectification using two mosfets reduces power dissipation and increases efficiency when compared to converters using external diodes. internal shoot-through current limiting circuit further reduces power dissipation. (2) current mode pwm con trol the pwm control signal of this ic depends on two feedback loops, the voltage feedback and the inductor current feedback. (a) pwm (pulse width modulation) control the clock signal coming from osc has a frequency of 1mhz. when osc sets the rs latch, th e p-channel mosfet is turned on and the n-channel mosfet is turned off. the opposite happens when the current comparator (current comp) resets the rs latch i.e. the p-channel mosfet is turned off and the n-channel mosfet is turned on. current comps output is a comparison of two signals, the current feedback control signal sense which is a voltage proportional to the current il, and the voltage feedback control signal, fb. (b) sllm tm (simple light load mode) control when the control mode is shifted by pwm from heavier load to lighter load or vice versa, the switching pulse is designed to turn off with the device held operat ing in normal pwm control loop. this allows linear operation without voltage drop or deterioration in transient response during the sudden load changes. although the pwm control loop continues to operate with a set signal from osc and a reset signal from current comp, it is so designed such that the reset signal is continuously sent even if the load is changed to light mode where the switching is tuned off and the switching pulses disappear. activating the switching discontinuously red uces the switching dissipation and improves the efficiency. figure 85. diagr am of current mode pwm control osc level sh ift driver logic r q s i l sw r ith current comp gm amp set reset fb load sense v out v out figure 86 . pwm switching timing chart figure 87 . sllm switching timing chart current comp set reset sw v out pv cc gnd gnd gnd i l (ave) v out (ave) sense fb current comp set reset sw v out pv cc gnd gnd gnd 0a v out (ave) sense fb i l not switching i l downloaded from: http:///
datas heet 29 / 46 bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 tsz02201-0j3j0aj00090-1-2 02.oct.2014 rev.003 2. description of func tions (1) soft-start function during start-up, the soft-start circuit gradually establishes the output voltage to limit the input current. this prevents the overshoot in the output voltage and inrush current. (2) shutdown function when the en terminal is low, the device operates in standby mode and all functional blocks, includ ing reference voltage circuit, internal oscillator and drivers, are turned off. circuit current during standby is 0 a (typ). (3) uvlo function the uvlo circuit detects whether the supplied input voltage is sufficient to obtain the output voltage of this ic. t he uvlo threshold, which has a hysteresis of 50mv to 300mv (typ), prevents output bouncing. so ft start time(typ) figure 88. soft start, shutdown, uvlo timing chart bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn unit t ss 3 1 1 5 1 msec (4) short-circuit protection with time delay function to protect the ic from breakdown, the short-circuit protection turns the output off when the internal current limiter i s activated continuously for a fixed time (t latch ) or more. the output that is kept off may be turned on again by restarting en or by resetting uvlo. timer latch time (typ) figure 89. short-circuit protection with time delay diagram bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn unit t latch 1 1 2 1 2 msec note: in addition to current limit circuit, output short detect circuit is built-in on bd9109fvm and bd9120hfn. if output voltage falls below 2v(typ, bd9109fvm) or v out x0.5(typ,bd9120hfn), output voltage will hold turned off. hysteresis 50 to 300mv t ss t ss t ss soft start standby mode operating mode standby mode operating mode standby mode opera ting mode standby mode uvlo en uvlo uvlo v cc en v out 1msec output off latch en v out limit i l standby mode operating mode standby mode operating mode en timer latch en downloaded from: http:///
datas heet 30 / 46 bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 tsz02201-0j3j0aj00090-1-2 02.oct.2014 rev.003 3. information on advantages advantage 1 offers fast transient response by using current mode control system voltage drop due to sudden change in load was reduced by about 5 0% . figure 90 . comparison of transient response advantage 2 offers high efficiency for all load ranges. (1) for lighter load: this ic utilizes the current mode control called sllm tm , which reduces various dissipations such as switching dissipation (p sw ), gate charge/discharge dissipation, esr dissipation of output capacitor (p esr ) and on -resistance dissipation (p ron ) that may otherwise cause reduction in efficiency. achieves efficiency improvement for lighter load. (2) for heavier load: this ic utilizes the synchronous rectifying mode and uses low on -resistance mosfet power transistors. on-resistance of high side mosfet : 200m to 30m (typ) on -resistance of low side mosfet: 15 0m to 250m ? (typ) achieves efficiency improvement for heavier load. offers high efficiency for all load ranges with the improvements mentioned above. advantage 3 ? supplied in smaller package due to small-sized power mosfets. (3 packages are mosp8, hson8, son008v5060) ? allows reduction in size of application products reduces mounting area required. figure 92 . example application conventional product (v out of which is 3.3 volts) bd9109fvm (load response i o =100ma to 600ma) ? output capacitor c o required for current mode control: 10 f ceramic capacitor ? inductance l required for the operating frequency of 1 mhz: 4.7 h inductor (bd9110nv: co=22f, l=2.2h) dc/dc convertor controller r ith l c o v out c ith v cc c in 10mm 15mm r ith c ith c in c o l 0.001 0.01 0.1 1 0 50 100 pwm sllm tm improvement by sllm system improvement by synchronous rectifier efficiency: [%] output current :i out [ a] figure 91. efficiency v out i out 228mv v out i out 110mv downloaded from: http:///
datas heet 31 / 46 bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 tsz02201-0j3j0aj00090-1-2 02.oct.2014 rev.003 4. switching regulator efficiency efficiency may be expressed by the equation shown below: efficiency may be improved by reducing the switching regulator power dissipation factors pd as follows: dissipation factors: (1) on -resistance dissipation of inductor and fet pd (i 2 r) where: r coil is the dc resistance of inductor r on is the on -resistance of fet i out is the output current (2) gate charge/discharge dissipation pd(gate) where: c gs is the gate capacitance of fet f is the switching frequency v is the gate driving voltage of fet (3) switching dissipation pd(sw) where: c rss is the reverse transfer capacitance of fet i drive is the peak current of gate (4) esr dissipation of capacitor pd(esr) where: i rms is the ripple current of capacitor esr is the equivalent series resistance (5) operating current dissipation of ic pd(ic) where: i cc is the circuit current ? ? ? ? on coil out r r i ri pd ? ? ? 2 2 ? ? 2 v f c gate pd gs ? ? ? ? ? drive out rss in i f i c v sw pd ? ? ? ? 2 ? ? esr i esr pd rms ? ? 2 ? ? cc in i v ic pd ? ? ? ? % 100 100 100 ? ? ? ? ? ? ? ? ? ? ? d out out in out in in out out p p p p p i v i v downloaded from: http:///
datas heet 32 / 46 bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 tsz02201-0j3j0aj00090-1-2 02.oct.2014 rev.003 5. consideration on permissible dissipation and heat generation since these ics function with high efficiency without significant heat generation in most applications, no special consideration is needed on permissible dissipation or heat generation. in case of extreme conditions, however, including lower input voltage, higher output voltage, heavier load, and/or higher temperature, the permissible dissipation and/or heat generation must be carefully considered. for dissipation, only conduction losses due to dc resistance of inductor and on-resistance of fet are considered. this is because conduction losses are the most significant among other dissipations mentioned above, such as gate charge/discharge dissipation and switching dissipation. if v cc =5v, v out =3.3v, r coil =0.1?, r onp =0.3?, r onn =0.2? i out =0.8a, for example, d=v out /v cc =3.3/5=0.66 r on =0.66x0.35+(1-0.66)x0.25 =0.231+0.085 =0.31[] ? ? ? ? mv p 298 316 .0 15 .0 8.0 2 ? ? ? ? since r onp is greater than r onn in these ics, the dissipation increases as the on duty becomes greater. taking into consideration the dissipation shown above, thermal design must be carried out with allowable sufficient margin. ambient temperature:ta [ c ] figure 9 3. thermal derating curve (msop8) ambient temperature: ta [ c ] ambient temperature: ta [ c ] figure 9 5. thermal derating curve (son008v5060) figure 9 4. thermal derating curve (hson8) ? ? ? ? onn onp on on coil out r d r d r r r ip ? ? ? ? ? ? ? ? 1 2 where: d is the on duty (=v ou t /v cc ) r coil is the dc resistance of coil r onp is the on -resistance of p-channel mos fet r onn is the on -resistance of n-channel mos fet i out is the output current 0 25 50 75 100 125 150 0 200 400 600 800 1000 85 387.5mw 587.4mw power dissipation:pd [mw] 0 25 50 75 100 125 150 0 2 4 6 0.910w 5.297w power dissipation:pd [w] 0 25 50 75 100 125 150 0 0.4 0.8 2.0 0.63w 1.33w power dissipation:pd [w] 85 105 1layer 70mm x 70mm x 1.6mmt ja=212.8c /w ic only ja=322.6c /w 1.75w 1.2 1.6 1layer 70mm x 70mm x 1.6mmt area of cupper foil 65%) ja=71.4c /w 1 layer 70mm x 70mm x 1.6mmt area of cupper foil 7%) ja=92.4c /w 1 layer 70mm x 70mm x 1.6mmt area of cupper foil 0.2%) ja=198.4c /w 4layer 74.2 mm x 74.2 mm x 1.6mmt , area of cupper foil in top layer 5505mm 2 ) ja=23.6c /w 4layer 74.2 mm x 74.2 mm x 1.6mmt area of cupper foil in top layer 6.28 mm 2 ) ja=31.4c /w 1 layer 74.2 mm x 74.2 mm x 1.6mmt area of cupper foil in top layer 0 mm 2 ) ja=137.4c /w ic only ja=195.3c /w 3.981w 0.640w downloaded from: http:///
datas heet 33 / 46 bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 tsz02201-0j3j0aj00090-1-2 02.oct.2014 rev.003 6. selection of components externally connected (1) selection of inductor (l) note: current exceeding the current rating of the i nductor results in magnetic saturation of the induc tor, which decreases efficiency. the inductor must be selected allowing sufficient m argin with which the peak current may not exceed it s current rating. if v cc =5v, v out =3.3v, f=1mhz, i l =0.3x0.8a=0.24a, for example, (bd9109fvm) note: select the inductor of low resistance component (such as dcr and acr) to minimize dissipation in the inductor for better efficiency. (2) selection of output capacitor (c o ) the output rise time must be designed to fall within the soft-start time, and the capacitance of output capacitor should be determined with consideration on the requirements of equation (5): ? ? out out limit ss o v i i t c ? ? ? where: t ss : soft-start time i limit : over current detection level, 2a(typ) in case of bd9109fvm, for instance, and if v out =3 .3v, i out =0.8a, and t ss =1ms, ? ? ? ? f m c o ? 364 3.3 8.0 2 1 ? ? ? ? inappropriate capacitance may cause problem in startup. a 10f to 100f ceramic capacitor is recommended. the inductance significantly depends on output ripple current. as seen in equation (1), the ripple current decreases as the inductor and/or switching frequency increases. appropriate ripple current at output should be +/-30% of the maximum output current. output capacitor should be selected with the consideration of the stability regi on and the equivalent series resistance required to minimize ripple voltage. output ripple voltage is determined by the equation (4): ??? (4) where: i l is the output ripple current, and esr is the equivalent series resistance of output capacitor note: rating of the capacitor should be determined allowing sufficient margin against output voltage. less esr allows reduction in output ripple voltage. figure 9 7. output capacitor i l figure 96. output ripple current i l v cc i l l c o v out v cc l c o v out esr ??? (1) ??? (2) ??? (3) where: i l is the output ripple current, and f is the switching frequency ? ? h m l ? ? 7.4 675 .4 1 5 24 .0 3.3 )3.3 5( ? ? ? ? ? ? ? ][ v esr i v l out ? ?? ? ? ? ? ? a f vl v v v i cc out out cc l ? ? ? ? ? ? ? ? a i i outmax l ? ? ? 3.0 ? ? ? ? h f v i v v v l cc l out out cc ? ? ? ? ? ? ??? (5) downloaded from: http:///
datas heet 34 / 46 bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 tsz02201-0j3j0aj00090-1-2 02.oct.2014 rev.003 (3) selection of input capacitor (c in ) ? ? cc out cc out out rms v v v v i i ? ? ? a low esr 10f/10v ceramic capacitor is recommended to reduce esr dissipation of input capacitor for b etter efficiency. (4 ) determination of r ith , c ith fo r phase compensation as the current mode control is designed to limit the inductor current, a pole (phase lag) appears in the low freq uency area due to a cr filter consisting of an output capacitor and a load resistance, while a zero (phase lead) ap pears in the high frequency area due to the output capacitor and its esr. so, the phases are easily compensated by adding a zero to the power amplifier output with c and r as described below to cancel a pole at the power amplifier. input capacitor must be a low esr capacitor with a capacitance sufficient to cope with high ripple current to prevent high transient voltage. the ripple current i rms is given by the equation (6): when v cc is twice the v out , < worst case > i rmsmax if v cc =5v, v out =3.3v, and i outm ax =0.8a, (bd9109fvm) figure 9 8. input capacitor v cc l co v out c in [a] ??? (6) figure 100. error amp phase compensation characteristics pole at power amplifier when the output current decreases, the load resistance ro increases and the pole frequency decreases. zero at power amplifier increasing capacitance of the output capacitor lowers the pole frequency while the zero frequency does not change. (this is because when the capacitance is doubled, the capacitor esr is reduced to half.) gain [db] phase [deg] a 0 0 - 90 a 0 0 - 90 f z (amp) fp(min) fp(max) f z (e sr) i outmin i o ut max gain [db] phase [deg] ? ? rms rms a i 38 .0 5 )3.3 5(3.3 8.0 ? ? ? ? fi gure 99. open loop g ain characteristics ? ? load heavier with hz c r fp o omin max ? ? ? ? ][ 2 1 ? ? ? load lighter with hz c r fp o omax min ? ? ? ? ][ 2 1 ? 2 out rms i i ? ? ? ith ith amp z c r f ? ? ? ? 2 1 o o c r fp ? ? ? ? 2 1 ? ? o esr z c esr f ? ? ? ? 2 1 downloaded from: http:///
datas heet 35 / 46 bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 tsz02201-0j3j0aj00090-1-2 02.oct.2014 rev.003 stable feedback loop may be achieved by canceling the pole fp (min) produced by the output cap acitor and the load resistance with cr zero correction by the error amplifier. (5) setting the output volt age (except for bd9109fvm) the output voltage v out is determined by the equation (7): ? ? adj out v r r v ? ? ? 1 / 1 2 ??? (7) where: v adj is the voltage at adj terminal (0.8v typ) the required output voltage may be determined by adjusting r 1 and r 2 . figure 10 2. determination of output voltage adjustable output voltage range : 1.0v to 1.5v/ bd9107fvm, bd9120hfn 1.0v to 2.5v/bd106fvm, bd9110nv use 1 k? to 100 k? resistor for r 1 . if a resistor with resistance higher than 100 k? is used , check the assembled set carefully for ripple voltage, etc. gnd,pgnd sw v cc ,pv cc en vout ith v cc v out c in r ith c ith l esr c o r o v out figure 10 1. typical application sw 6 1 adj l c o r 2 r 1 output ? ? ? ? o omax ith ith min amp c r c r fp fz ? ? ? ? ? ?? ? ? ? ? 2 1 2 1 downloaded from: http:///
datas heet 36 / 46 bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 tsz02201-0j3j0aj00090-1-2 02.oct.2014 rev.003 7. cautions on pc board layout bd9106fvm, bd9107fvm, bd9109fvm, bd9120hfn figure 103. layout diagram bd9110nv figure 104. layout diagram for the sections drawn with heavy line, use thick conductor pattern as short as possible. lay out the input ceramic capacitor c in closer to the pins pv cc and pgnd, and the output capacitor c o closer to the pin pgnd. lay out c ith and r ith between the pins ith and gnd as neat as possible with least necessary wiring. note: the package of hson8 (bd9120hfn) and son008v5050 (bd9110nv) has thermal fin on the reverse of the package. the package thermal performance may be enhanced by bonding the fin to gnd plane which take a large area of pcb. 8 7 6 5 vout/adj ith en gnd v cc pv cc sw pgnd c o gnd vout v cc l en r ith c ith c in 1 2 3 4 adj v cc ith gnd en pv cc sw pgnd v cc r ith gnd c o c in vout en l c ith 1 2 3 4 8 7 6 5 r 2 r 1 downloaded from: http:///
datas heet 37 / 46 bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 tsz02201-0j3j0aj00090-1-2 02.oct.2014 rev.003 8. recommended components lists on above application table1. [bd9106fvm] symbol part value manufacturer series l coil 4.7h sumida cmd6d11b tdk vlf5014at-4r7m1r1 c in ceramic capacitor 10f kyocera cm316x5r106k10a c o ceramic capacitor 10f kyocera cm316x5r106k10a c ith ceramic capacitor 750pf murata grm18series r ith resistance v out =1.0v 18k rohm mcr10 1802 v out =1.2v 22k rohm mcr10 2202 v out =1.5v 22k rohm mcr10 2202 v out =1.8v 27k rohm mcr10 2702 v out =2.5v 3k rohm mcr10 3602 table2. [bd9107fvm] symbol part value manufacturer series l coil 4.7h sumida cmd6d11b tdk vlf5014at-4r7m1r1 c in ceramic capacitor 10f kyocera cm316x5r106k10a c o ceramic capacitor 10f kyocera cm316x5r106k10a c ith ceramic capacitor 1000pf murata grm18series r ith resistance v out =1.0v 4.3k rohm mcr10 4301 v out =1.2v .8k rohm mcr10 6801 v out =1.5v 9.1k rohm mcr10 9101 v out =1.8v 12k rohm mcr10 1202 table3. [bd9109vm] symbol part value manufacturer series l coil 4.7h sumida cmd6d11b tdk vlf5014at-4r7m1r1 c in ceramic capacitor 10f kyocera cm316x5r106k10a c o ceramic capacitor 10f kyocera cm316x5r106k10a c ith ceramic capacitor 330pf murata grm18series r ith resistance 30k rohm mcr10 3002 table4. [bd9110nv] symbol part value manufacturer series l coil 2.2h tdk ltf5022t-2r2n3r2 c in ceramic capacitor 10f kyocera cm316x5r106k10a c o ceramic capacitor 22f kyocera cm316b226k06a c ith ceramic capacitor 1000pf murata grm18series r ith resistance v out =1.0v 12k rohm mcr10 1202 v out =1.2v v out =1.5v v out =1.8v v out =2.5v downloaded from: http:///
datas heet 38 / 46 bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 tsz02201-0j3j0aj00090-1-2 02.oct.2014 rev.003 table5. [bd9120hfn] symbol part value manufacturer series l coil 4.7h sumida cmd6d11b tdk vlf5014at-4r7m1r1 c in ceramic capacitor 10f kyocera cm316x5r106k10a c o ceramic capacitor 10f ky ocera cm316x5r106k10a c ith ceramic capacitor 680pf murata grm18series r ith resistance v out =1.0v 8.2k rohm mcr10 8201 v out =1.2v 8.2k rohm mcr10 8201 v out =1.5v 4.7k rohm mcr10 4701 note:the parts list presented above is an example of recommended parts. although the parts are the same, actual circuit characteristics should be checked on your application carefully before use. be sure to allow sufficient margins to accomm odate variations between external devices and this ic when employing the depicted circuit with other circuit constants modified. both static and trans ient characteristics should be considered in establishing these margins. when switching noise is substantial and may impact the system, a low pass filt er should be inserted between the vcc and pvcc pins, and a schottky barrier diode established between the sw and pgnd pins. downloaded from: http:///
datas heet 39 / 46 bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 tsz02201-0j3j0aj00090-1-2 02.oct.2014 rev.003 i/o equivalent circuit bd9106fvm, bd9107fvm, bd9109fvm bd9110nv, bd9120hfn figure 105. i/o equivalent circuit v cc en 10k ? ? en pin v cc adj 10k ? ? adj pin (bd9106fvm, bd9107fvm) v cc vout 10k ? ? vout pin (bd9109fvm) v cc ith v cc ? ith pin ? sw pin pv cc sw pv cc pv cc en 10k ? ? en pin ? sw pin pv cc sw pv cc pv cc ith ? ith pin (bd9120hfn) v cc ith ? ith pin (bd9110nv) v cc adj 10k ? ? adj pin downloaded from: http:///
datas heet 40 / 46 bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 tsz02201-0j3j0aj00090-1-2 02.oct.2014 rev.003 operational notes 1. reverse connection of power s upply connecting the power supply in reverse polarity can damage the ic. take precautions against reverse polarity when connecting the power supply, such as mounting an external diode between the power supply and th e ic s power supply pins. 2. power supply lines design the pcb layout pattern to provide low impedance supply lines. separate the ground and supply lines of the digital and analog blocks to prevent noise in the ground and supply lines of the digital block from affecting the analog block. furthermore, connect a capacitor to ground at all power supply pins . consider the effect of temperature and aging on the capacitance value when using electrolytic capacitors. 3. ground voltage ensure that no pins are at a voltage below that of the ground pin at any time, even during transient condition. 4. ground wiring pattern when using both small-signal and large-current ground traces, the two ground traces should be routed separately but connected to a single ground at the reference point of the application board to avoid fluctuations in the small-signal ground caused by large currents. also ensure that the ground traces of external components do not cause variations on the ground voltage. the ground lines must be as short and thick as possible to reduce line impedance. 5. thermal consideration should by any chance the power dissipation rating be exceeded the rise in temperature of the chip may result in deterioration of the properties of the chip. in case of exceeding this absolute maximum rating, increase the board size and copper area to prevent exceeding the pd rating. 6. recommended operating conditions these conditions represent a range within which the expected characteristics of the ic can be approximately obtained . the electrical characteristics are guaranteed under the conditions of each parameter. 7. inrush current when power is first supplied to the ic, it is possible that the internal logic may be unstable and inrush current may flow instantaneously due to the internal powering sequence and delays, especially if the ic has more than one power supply. therefore, give special consideration to power coupling capacitance, power wiring, width of ground wiring, and routing of connections. 8. operation under strong electromagnetic field operating the ic in the presence of a strong electromagnetic field may cause the ic to malfunction. 9. testing on application boards when testing the ic on an application board, connecting a capacitor directly to a low-impedance output pin may subject the ic to stre ss. always discharge capacitors completely after each process or step. the ics power supply should always be turned off completely before connecting or removing it from the test setup during the inspection process. to prevent damage from static discharge, ground the ic during assembly and use similar precautions during transport and storage. 10. inter-pin short and mounting errors ensure that the direction and position are correct when mounting the ic on the pcb. incorrect mounting may result in damaging the ic. avoid nearby pins being shorted to each other especially to ground, power supply and outp ut pin . inter-pin shorts could be due to many reasons such as metal particles, water droplets (in very humid environment) and unintentional solder bridge deposited in between pins during assembly to name a few. downloaded from: http:///
datas heet 41 / 46 bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 tsz02201-0j3j0aj00090-1-2 02.oct.2014 rev.003 operational notes C continued 11. unused input pins input pins of an ic are often connected to the gate of a mos transistor. the gate has extremely high impedance and extremely low capacitance. if left unconnected, the electric field from the outside can easily charge it. the small charge acquired in this way is enough to produce a significant effect on the conduction through the transistor and cause unexpected operation of the ic. so unless otherwise specified, unused input pins should be connected to the power supply or ground line. 12. regarding the input pin of the ic this monolithic ic contains p+ isolation and p substrate layers between adjacent elements in order to keep them isolated. p-n junctions are formed at the intersection of the p layers with the n layers of other elements, creating a parasitic diode or transistor. for example (refer to figure below): when gnd > pin a and gnd > pin b, the p-n junction operates as a parasitic diode. when gnd > pin b, the p-n junction operates as a parasitic transistor. parasitic diodes inevitably occur in the structure of the ic. the operation of parasitic diodes can result in mutual interference among circuits, operational faults, or physical damage. therefore, conditions that cause these diodes to operate, such as applying a voltage lower than the gnd voltage to an input pin (and thus to the p s ubstrate) should be avoided. figure 106. example of monolithic ic structure 13. thermal shutdown circuit(tsd) this ic has a built -in thermal shutdown circuit that prevents heat damage to the ic. normal operation should always be within the ics power dissipation rating. if however the rating is exceeded for a continued perio d, the junction temperature (tj) will rise which will activate the tsd circuit that will turn off all output pins. when the tj falls below the tsd threshold, the circuits are automatically restored to normal operation. note that the tsd circuit operates in a situation that exceeds the absolute maximum ratings and therefore, under no circumstances, should the tsd circuit be used in a set design or for any purpose other than protecting the ic from heat damage. n n p + p n n p + p substrate gnd n p + n n p + n p p substrate gnd gnd parasitic elements pin a pin a pin b pin b b c e parasitic elements gnd parasitic elements c be transistor (npn) resistor n region close-by parasitic elements downloaded from: http:///
42 / 46 bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn datas heet www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 tsz02201-0j3j0aj00090-1-2 02.oct.2014 rev.003 ordering information marking diagrams bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn b d 9 1 x x x x x - x x pa rt number package nv : son008v5060 hfn:msop8 fvm:hson8 packaging and forming specification e2: embossed tape and reel (son008v5060,) tr : embossed tape and reel (msop8, hson8) msop8(top view) d 9 1 part number marking lot number 1pin mark 0 6 hson8 (top view) 2 0 part number marking lot number 1pin mark d 9 1 son008v5060 (top view) b d 9 1 1 0 part number marking lot number 1pin mark msop8(top view) d 9 1 part number marking lot number 1pin mark 0 7 msop8(top view) d 9 1 part number marking lot number 1pin mark 0 9 downloaded from: http:///
43 / 46 bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn datas heet www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 tsz02201-0j3j0aj00090-1-2 02.oct.2014 rev.003 physical dimension tape and reel information package name msop8 downloaded from: http:///
44 / 46 bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn datas heet www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 tsz02201-0j3j0aj00090-1-2 02.oct.2014 rev.003 physical dimension tape and reel information - continued package name hson8 downloaded from: http:///
45 / 46 bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn datas heet www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 tsz02201-0j3j0aj00090-1-2 02.oct.2014 rev.003 physical dimension tape and reel information - continued package name son008v5060 downloaded from: http:///
46 / 46 bd9106fvm bd9107fvm bd9109fvm bd9110nv bd9120hfn datas heet www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 tsz02201-0j3j0aj00090-1-2 02.oct.2014 rev.003 revision history date revision changes 17.jan.2012 001 new release 20.sep.2013 002 revise the items about power dissipation 02.oct.2014 00 3 applied the rohm standard style and improved understandability. downloaded from: http:///
notice C ge rev.003 ? 2014 rohm co., ltd. all rights reserved. notice precaution on using rohm products 1. our products are designed and manufactured for application in ordinary electronic equipments (such as av equipment, oa equipment, telecommunication equipment, home electronic appliances, amusement equipment, etc.). if you intend to use our products in devices requiring extremely h igh reliability (such as medical equipment (note 1) , transport equipment, traffic equipment, aircraft/spacecraft, nuclear power c ontrollers, fuel controllers, car equipment including car accessories, safety devices, etc.) and whose malfunction or failure may cause loss of human life, bodily injury or serious damage to property (specific applications), please c onsult with the rohm sales representative in advance. unless otherwise agreed in writing by rohm in advance, rohm s hall not be in any way responsible or liable for any damages, expenses or losses incurred by you or third parties arisin g from the use of any rohms products for specific applications. (note1) medical equipment classification of the specific appli cations japan usa eu china class class class b class class | class 2. rohm designs and manufactures its products subject to s trict quality control system. however, semiconductor products can fail or malfunction at a certain rate. please be sure to implement, at your own responsibilities, adeq uate safety measures including but not limited to fail-safe design against the physical injury, damage to any property, which a failure or malfunction of our products may cause. the followi ng are examples of safety measures: [a] installation of protection circuits or other protective devic es to improve system safety [b] installation of redundant circuits to reduce the impact of single or multiple circuit failure 3. our products are designed and manufactured for use under standard conditions and not under any special or extraordinary environments or conditions, as exemplified be low. accordingly, rohm shall not be in any way responsible or liable for any damages, expenses or losses arising from the use of any rohms products under any special or extraordinary environments or conditions. if you intend to use our products under any special or extraordinary environments or conditions (as exemplified belo w), your independent verification and confirmation of product performance, reliability, etc, prior to use, must be n ecessary: [a] use of our products in any types of liquid, including water, oils, chemicals, and organi c solvents [b] use of our products outdoors or in places where the products are exposed to direct sunlight or dust [c] use of our products in places where the products are ex posed to sea wind or corrosive gases, including cl 2 , h 2 s, nh 3 , so 2 , and no 2 [d] use of our products in places where the products are exposed to static electricity or electromagnetic waves [e] use of our products in proximity to heat-producing components , plastic cords, or other flammable items [f] sealing or coating our products with resin or other coating materials [g] use of our products without cleaning residue of flux (even if you use no-clean type fluxes, cleaning residue of flux is recommended); or washing our products by using water or water-soluble cleaning agents for cleaning residue after soldering [h] use of the products in places subject to dew condensation 4. the products are not subject to radiation-proof design. 5. please verify and confirm characteristics of the final or mou nted products in using the products. 6. in particular, if a transient load (a large amount of load a pplied in a short period of time, such as pulse. is applied, confirmation of performance characteristics after on-board moun ting is strongly recommended. avoid applying power exceeding normal rated power; exceeding the power rating u nder steady-state loading condition may negatively affect product performance and reliability. 7. de -rate power dissipation (pd) depending on ambient temperature (ta). whe n used in sealed area, confirm the actual ambient temperature. 8. confirm that operation temperature is within the specified range described in the product specification. 9. rohm shall not be in any way responsible or liable for failure induced under deviant condition from what is defined in this document. precaution for mounting / circuit board design 1. when a highly active halogenous (chlorine, bromine, e tc.) flux is used, the residue of flux may negatively affect p roduct performance and reliability. 2. in principle, the reflow soldering method must be used on a surface-mount products, the flow soldering method mus t be used on a through hole mount products. i f the flow soldering method is preferred on a surface-mount p roducts , please consult with the rohm representative in advance. for details, please refer to rohm mounting specification downloaded from: http:///
notice C ge rev.003 ? 2014 rohm co., ltd. all rights reserved. precautions regarding application examples and external circuits 1. if change is made to the constant of an external circuit, please allow a sufficient margin considering variations of the characteristics of the products and external components, incl uding transient characteristics, as well as static characteristics. 2. you agree that application notes, reference designs, and associated data and information contained in this docu ment are presented only as guidance for products use. therefore, i n case you use such information, you are solel y responsible for it and you must exercise your own independ ent verification and judgment in the use of such information contained in this document. rohm shall not be in any way respon sible or liable for any damages, expenses or losses incurred by you or third parties arising from the use of such informat ion. precaution for electrostatic this product is electrostatic sensitive product, which may b e damaged due to electrostatic discharge. please take pro per caution in your manufacturing process and storage so t hat voltage exceeding the products maximum rating will not be applied to products. please take special care under dry con dition (e.g. grounding of human body / equipment / solder iron , isolation from charged objects, setting of ionizer, friction prevention and temperature / humidity control). precaution for storage / transportation 1. product performance and soldered connections may deteriorate if the products are stored in the places where: [a] the products are exposed to sea winds or corrosive gases, inc luding cl2, h2s, nh3, so2, and no2 [b] the temperature or humidity exceeds those recommended by rohm [c] the products are exposed to direct sunshine or condensation [d] the products are exposed to high electrostatic 2. even under rohm recommended storage condition, solderab ility of products out of recommended storage time period may be degraded. it is strongly recommended to confirm so lderability before using products of which storage time is exceeding the recommended storage time period. 3. store / transport cartons in the correct direction, which is in dicated on a carton with a symbol. otherwise bent leads may occur due to excessive stress applied when dropping of a c arton. 4. use products within the specified time after opening a hum idity barrier bag. baking is required before using products of which storage time is exceeding the recommended storage tim e period. precaution for product label qr code printed on rohm products label is for rohm s internal use only. precaution for disposition when disposing products please dispose them properly usin g an authorized industry waste company. precaution for foreign exchange and foreign trade act since our products might fall under controlled goods prescr ibed by the applicable foreign exchange and foreign trade act, please consult with rohm representative in case of export. precaution regarding intellectual property rights 1. all information and data including but not limited to ap plication example contained in this document is for referen ce only. rohm does not warrant that foregoing information or da ta will not infringe any intellectual property rights or any other rights of a ny third party regarding such information or data. rohm shall not be in any way responsible or liable for infringement of any intellectual property rights or other d amages arising from use of such information or data.: 2. no license, expressly or implied, is granted hereby under any i ntellectual property rights or other rights of rohm or any third parties with respect to the information contained in this d ocument. other precaution 1. this document may not be reprinted or reproduced, in whole or in part, without prior written consent of rohm. 2. the products may not be disassembled, converted, modified, reproduced or otherwise changed without prior written consent of rohm. 3. in no event shall you use in any way whatsoever the products and the related technical information contained in the products or this document for any military purposes, includi ng but not limited to, the development of mass-destruction weapons. 4. the proper names of companies or products described i n this document are trademarks or registered trademarks of rohm, its affiliated companies or third parties. downloaded from: http:///
datasheet datasheet notice ? we rev.001 ? 2014 rohm co., ltd. all rights reserved. general precaution 1. before you use our pro ducts, you are requested to care fully read this document and fully understand its contents. rohm shall n ot be in an y way responsible or liabl e for fa ilure, malfunction or acci dent arising from the use of a ny rohms products against warning, caution or note contained in this document. 2. all information contained in this docume nt is current as of the issuing date and subj ec t to change without any prior notice. before purchasing or using rohms products, please confirm the la test information with a rohm sale s representative. 3. the information contained in this doc ument is provi ded on an as is basis and rohm does not warrant that all information contained in this document is accurate an d/or error-free. rohm shall not be in an y way responsible or liable for an y damages, expenses or losses incurred b y you or third parties resulting from inaccur acy or errors of or concerning such information. downloaded from: http:///

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