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1 / 40 02.mar.2012 rev.001 www.rohm.com tsz02201 - 0j3j0aj00090 - 1 - 2 ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 14 ? 001 synchronous buck converter i ntegrated fet BD9106FVM bd9107fvm bd9109fvm bd9110nv bd9120hfn general description rohms high efficiency step - down switching regulator s ( BD9106FVM,bd9107fvm,bd9109fvm,bd9110nv,b d9120hfn ) are the power supply designed to pr oduce a low voltage including 1 volts from 5/3.3 volts power supply line. offers high efficiency with our original pulse skip control technology and synchronous rectifier. employs a current mode control system to provide faster transient response to sudde n change in load. features ? offers fast transient response with current mode pwm control system. ? offers highly efficiency for all load range with synchronous rectifier (nch/pch fet) and sllm tm (simple light load mode) i ncorporates soft - start function. ? incorporates th ermal protection and ulvo functions. ? incorporates short - current protection circuit with time delay function. ? incorporates shutdown function power supply for lsi including dsp, micro computer and asic ? 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 ? out put 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 temperatur e range bd9110nv: - 25 to + 10 5 bd9120hfn,BD9106FVM: - 25 to +85 bd9107fvm,bd9109fvm: - 25 to +85 packages (typ.) (typ.) (max.) 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 1.0 0mm product structure silicon monolithi c integrated circuit this product is not designed protection against radioactive rays. gnd,pgnd sw v cc ,pv cc en v out ith v cc v out cin r ith c ith l esr c o r o v out fig. 1 typical application circuit hson8 son008v5060 msop 8
data s heet 2 / 40 BD9106FVM bd9107fvm bd9109fvm bd9110nv bd9120hfn 02.mar.2012 rev.001 tsz02201 - 0j3j0aj00090 - 1 - 2 www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 pin configuration s pin description s BD9106FVM , bd9107fvm , bd9109fvm pin no. pin name pin function 1 adj/v out output voltage detect pin/ adj for bd9106 ? cc pch fet source pin 8 v cc v cc power supply input pin bd9110nv pin no. pin nam e pin function 1 adj output voltage adjust pin 2 v cc v cc power supply input pin 3 ith gmamp output pin/connected phase compensation capacitor 4 gnd ground 5 pgnd nch fet source pin 6 sw pch/nch fet drain output pin 7 pv cc pch fet source pin 8 en en able pin(active high) bd9120hfn pin no. pin name pin function 1 adj output voltage adjust pin 2 ith gmamp output pin/connected phase compensation capacitor 3 en enable pin(active high) 4 gnd ground 5 pgnd nch fet source pin 6 sw pch/nch fet drain output pin 7 pv cc pch fet source pin 8 v cc v cc power supply input pin 8 v cc 7 pv cc 6 sw 5 pgnd 1 adj 2 ith 3 en 4 gnd fig.2 bd9106 fvm , bd9107fvm 8 v cc 7 pv cc 6 sw 5 pgnd 1 v out 2 ith 3 en 4 gnd fig.3 bd9109fvm adj 1 v cc 2 ith 3 gnd 4 8 en 7 pv cc 6 sw 5 pgnd fig. 4 bd9110nv adj ith en gnd v cc pv cc sw pgnd 8 1 2 3 4 5 6 7 fig. 5 bd9120hfn (top view) (top view) (top view) (top view)
data s heet 3 / 40 BD9106FVM bd9107fvm bd9109fvm bd9110nv bd9120hfn 02.mar.2012 rev.001 tsz02201 - 0j3j0aj00090 - 1 - 2 www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 ordering information line u p operating temperature range i nput voltage range out put voltage range output current - 25 to +85 4.0 v to 5.5v adjustable (1.0 to 2.5v) 0.8a 3 .4v msop8 reel of 30 00 bd9 106fvm - tr adjustable (1.0 to 1.8v) 1.2a 2.7v msop8 reel of 30 00 bd9 107 f vm - tr 4.5v to 5.5v 3.302% 0.8a 3.8v msop8 reel of 30 00 bd9 109 f vm - tr 2.7v to 4.5v adjustable (1.0 to 1.5v) 0.8a 2.5v hson8 reel of 30 00 bd9 120hfn - tr - 25 to +10 5 4.5v to 5.5v adjustable (1.0 to 2.5v) 2.0a 3.7v son00 8v5060 reel of 20 00 bd9 110nv - e2 absolute maximum ratings (ta=25 parameter symbol limits unit bd910 x fvm bd9110nv bd9120hfn v cc voltage v cc - 0.3 to +7 * 1 - 0.3 to +7 * 1 - 0.3 to +7 * 1 v pv cc voltage pv cc - 0.3 to +7 * 1 - 0.3 to +7 * 1 - 0.3 to +7 * 1 v en voltage en - 0.3 to +7 - 0.3 to +7 - 0.3 to +7 v sw,ith voltage sw,ith - 0.3 to +7 - 0.3 to +7 - 0.3 to +7 v power dissipation 1 pd1 387.5 * 2 900 * 4 1350 * 6 mw power dissipation 2 pd2 587.4 * 3 3 900 * 5 1750 * 7 mw operating temperature range topr - 25 to +85 - 25 to +105 - 25 to +85 storage temperature range tstg - 55 to +150 - 55 to +150 - 55 to +150 maximum junction temperature tjmax +150 +150 +150 * 1 pd should not be exceeded. * 2 derating in done 3.1mw/ for temperatures above ta=25 . * 3 derating in done 4.7mw/ for temperatu res above ta=25 , mounted on 70mm70mm1.6mm glass epoxy pcb. * 4 derating in done 7.2mw/ for temperatures above ta=25 , mounted on 70mm70mm1.6mm glass epoxy pcb which has 1 layer (3%) of copper on the back side). * 5 derating in done 31.2mw/ for tempe ratures above ta=25 , mounted on a board according to jesd51 - 7. * 6 derating in done 10.8mw/ for temperatures above ta=25 , mounted on 70mm70mm1.6mm glass epoxy pcb which has 1 layer (7%) of copper on the back side). * 7 derating in done 14mw/ for tem peratures above ta=25 , mounted on 70mm70mm1.6mm glass epoxy pcb which has 1 layer (6 . 5%) of copper on the back side). recommended operating ratings (ta=25 parameter symbol BD9106FVM bd9107fvm bd9109fvm bd9110nv bd9120hfn unit min. max. min. m ax. min. max. min. max. min. max. v cc voltage v cc * 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 * 8 4.0 5.5 4.0 5.5 4.5 5.5 4.5 5.5 2.7 4.5 v en voltage en 0 v cc 0 v cc 0 v cc 0 v cc 0 v cc v sw average output current isw * 8 - 0.8 - 1.2 - 0.8 - 2.0 - 0.8 a * 8 pd should not be exceeded. b d 9 1 x x x x - x x part number package nv:son008v5060 hfn:hson8 fvm:msop8 packaging and forming specification e2: embossed tape and reel tr : embossed tape and reel
data s heet 4 / 40 BD9106FVM bd9107fvm bd9109fvm bd9110nv bd9120hfn 02.mar.2012 rev.001 tsz02201 - 0j3j0aj00090 - 1 - 2 www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 electrical characteristics BD9106FVM (ta=25 , v cc =5v, 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 cc - 250 400 a enl - gnd 0.8 v standby mode en high voltage v enh 2.0 vcc - v active mode en input current i en - 1 10 a en =5v oscillation frequency f osc 0.8 1 1.2 mhz pch fet on resistance *9 r onp - 0.35 0.60 cc =5v nch fet on resistance *9 r onn - 0.25 0.50 cc =5v ad j voltage v adj 0.780 0.800 0.820 v output voltage *9 v out - 1.200 - v ith si nk current i thsi 10 20 - a s ource c urrent i thso 10 20 - a uvloth 3.2 3.4 3.6 v v cc =hl uvlohys 50 100 200 mv soft start time t ss 1.5 3 6 ms timer latch time t latch 0.5 1 2 ms *9 outgoing inspection is not done on all products bd9107fvm (ta=25 , v cc =5v, en=v cc , r 1 =20k, r 2 =10k unless otherwise specified. ) parameter symbol min. typ. max. unit c onditions standby current i stb - 0 10 a cc - 250 400 a enl - gnd 0.8 v standby mode en high voltage v enh 2.0 vcc - v active mode en input current i en - 1 10 a en =5v oscillation frequency f osc 0.8 1 1.2 mhz pch fet on resistance *9 r onp - 0.35 0.60 cc =5v nch fet on resistance *9 r onn - 0.25 0.50 cc =5v adj voltage v adj 0.780 0.800 0.820 v output voltage *9 v out - 1.200 - v ith si nk current i thsi 10 20 - a out =h ith s ource c urrent i ths o 10 20 - a out =l uvlo threshold voltage v uvloth 2.6 2.7 2.8 v v cc =hl 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 *9 outgoing inspection is not done on all products bd9109f vm (ta=25 , v cc =pv cc =5v, en= v cc unless otherwise specified. ) parameter symbol min. typ. max. unit conditions standby current i stb - 0 10 a cc - 250 400 a enl - gnd 0.8 v standby mode en high voltage v enh 2.0 vcc - v active mode en input current i en - 1 10 a en =5v oscillation frequency f osc 0.8 1 1.2 mhz pch fet on resistance *9 r onp - 0.35 0.60 cc =5v nch fet on resistance *9 r onn - 0.25 0.50 cc =5v output voltage v out 3.234 3.300 3.366 v ith si nk current i thsi 10 20 - a out =h ith s ource c urrent i thso 10 20 - a out =l uvlo threshold voltage v uvlo1 3.6 3.8 4.0 v v cc =h uvlo2 3.65 3.9 4.2 v v cc =l 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 *9 outgoing inspection is not done on all products
data s heet 5 / 40 BD9106FVM bd9107fvm bd9109fvm bd9110nv bd9120hfn 02.mar.2012 rev.001 tsz02201 - 0j3j0aj00090 - 1 - 2 www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 bd9110nv (ta=25 , v cc =pv cc =5v, en=v cc , r 1 =10k,r 2 =5k unless otherwise specified. ) parameter symbol min. typ. max. unit conditions standby current i stb - 0 10 a cc - 250 350 a enl - gnd 0.8 v standby mode en high voltage v enh 2.0 v cc - v active mode en input current i en - 1 10 a en =5v oscillation frequency f osc 0.8 1 1.2 mhz pch fet on resistance *9 r onp - 200 320 m cc =5v nch fet on resistance *9 r onn - 150 270 m cc =5v adj voltage v adj 0.780 0.800 0.820 v output voltage *9 v out - 1.200 - v ith si nk current i thsi 10 20 - a out =h ith s ource c u rrent i thso 10 20 - a out =l uvlo threshold voltage v uvloth 3.5 3.7 3.9 v v cc =h uvlohys 50 100 200 mv soft start time t ss 2.5 5 10 ms timer latch time t latch 0.5 1 2 ms *9 outgoing inspection is not done on all products bd9120hfn (ta=25 , v cc =pv cc =3.3v, 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 cc - 200 400 a enl - gnd 0.8 v standby mode en high voltage v enh 2.0 v cc - v active mode en input current i en - 1 10 a en =3.3v oscillation frequency f osc 0.8 1 1.2 mhz pch fet on resistance *9 r onp - 0.35 0.60 cc =3.3v nch fet on resistance *9 r onn - 0.25 0.50 cc =3.3v adj voltage v ad j 0.780 0.800 0.820 v output voltage *9 v out - 1.200 - v ith si nk current i thsi 10 20 - a out =h ith s ource c urrent i thso 10 20 - a out =l uvlo threshold voltage v uvlo1 2.400 2.500 2.600 v v cc =h uvlo2 2.425 2.5 50 2.700 v v cc =l 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 0.5 v out 0.7 v v out =h *9 outgoing inspection is not done on all products
data s heet 6 / 40 BD9106FVM bd9107fvm bd9109fvm bd9110nv bd9120hfn 02.mar.2012 rev.001 tsz02201 - 0j3j0aj00090 - 1 - 2 www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 block diagram bd9106 fvm , bd9107fvm bd9109fvm fig.6 BD9106FVM , bd9107fvm block diagram fig. 7 bd9109fvm block diagram
data s heet 7 / 40 BD9106FVM bd9107fvm bd9109fvm bd9110nv bd9120hfn 02.mar.2012 rev.001 tsz02201 - 0j3j0aj00090 - 1 - 2 www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 bd9110nv bd9120hfn fig. 8 bd9110nv block diagram fig.9 bd9120hfn block diagram
data s heet 8 / 40 BD9106FVM bd9107fvm bd9109fvm bd9110nv bd9120hfn 02.mar.2012 rev.001 tsz02201 - 0j3j0aj00090 - 1 - 2 www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 typical performance curves BD9106FVM fig. 10 vcc - vout fig.1 1 ven - vout fig.1 2 iout - vout fig.1 3 ta - vout
data s heet 9 / 40 BD9106FVM bd9107fvm bd9109fvm bd9110nv bd9120hfn 02.mar.2012 rev.001 tsz02201 - 0j3j0aj00090 - 1 - 2 www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 fig.1 7 ta - ven fig.1 5 ta - fosc fig.1 6 ta - ronn, ronp fig.1 4 efficiency
data s heet 10 / 40 BD9106FVM bd9107fvm bd9109fvm bd9110nv bd9120hfn 02.mar.2012 rev.001 tsz02201 - 0j3j0aj00090 - 1 - 2 www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 fig.2 1 sw waveform io=10ma fig.1 9 vcc - fosc fig. 20 soft start waveform fig.1 8 ta - icc
data s heet 11 / 40 BD9106FVM bd9107fvm bd9109fvm bd9110nv bd9120hfn 02.mar.2012 rev.001 tsz02201 - 0j3j0aj00090 - 1 - 2 www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 fig.2 2 sw waveform io=200ma fig. 2 3 transient response io=100 600ma(10s) 100ma(10s)
data s heet 12 / 40 BD9106FVM bd9107fvm bd9109fvm bd9110nv bd9120hfn 02.mar.2012 rev.001 tsz02201 - 0j3j0aj00090 - 1 - 2 www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 bd9107fvm fig.2 5 vcc - vout fig.2 6 ven - vout fig.2 7 iout - vout fig.2 8 ta - vout
data s heet 13 / 40 BD9106FVM bd9107fvm bd9109fvm bd9110nv bd9120hfn 02.mar.2012 rev.001 tsz02201 - 0j3j0aj00090 - 1 - 2 www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 fig.2 9 efficiency fig. 30 ta - fosc fig. 3 1 ta - r onn , r onp fig.3 2 ta - v en
data s heet 14 / 40 BD9106FVM bd9107fvm bd9109fvm bd9110nv bd9120hfn 02.mar.2012 rev.001 tsz02201 - 0j3j0aj00090 - 1 - 2 www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 fig.3 3 ta - i cc fig.3 4 vcc - fosc fig.3 5 soft start waveform fig.3 6 sw waveform io=10ma
data s heet 15 / 40 BD9106FVM bd9107fvm bd9109fvm bd9110nv bd9120hfn 02.mar.2012 rev.001 tsz02201 - 0j3j0aj00090 - 1 - 2 www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 fig.3 7 sw waveform io=500ma fig. 3 8 transient response io=100 600ma(10s) 100ma(10s)
data s heet 16 / 40 BD9106FVM bd9107fvm bd9109fvm bd9110nv bd9120hfn 02.mar.2012 rev.001 tsz02201 - 0j3j0aj00090 - 1 - 2 www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 bd9109fvm fig.40 vcc - vout fig. 4 1 ven - vout fig. 4 2 iout - vout fig. 4 3 ta - vout
data s heet 17 / 40 BD9106FVM bd9107fvm bd9109fvm bd9110nv bd9120hfn 02.mar.2012 rev.001 tsz02201 - 0j3j0aj00090 - 1 - 2 www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 fig. 4 4 efficiency fig. 4 5 ta - fosc fig. 4 6 ta - ronn, ronp fig. 4 7 ta - ven
data s heet 18 / 40 BD9106FVM bd9107fvm bd9109fvm bd9110nv bd9120hfn 02.mar.2012 rev.001 tsz02201 - 0j3j0aj00090 - 1 - 2 www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 fig. 4 8 ta - icc fig.4 9 vcc - fosc fig. 50 soft start waveform fig.5 1 sw waveform io=10ma
data s heet 19 / 40 BD9106FVM bd9107fvm bd9109fvm bd9110nv bd9120hfn 02.mar.2012 rev.001 tsz02201 - 0j3j0aj00090 - 1 - 2 www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 fig.5 2 sw waveform io=500ma fig. 5 3 transient response io=100 600ma(10s) 100ma(10s)
data s heet 20 / 40 BD9106FVM bd9107fvm bd9109fvm bd9110nv bd9120hfn 02.mar.2012 rev.001 tsz02201 - 0j3j0aj00090 - 1 - 2 www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 b d9110nv fig. 5 7 iout - vout fig. 5 8 ta - vout fig. 5 5 vcc - vout fig. 5 6 ven - vout
data s heet 21 / 40 BD9106FVM bd9107fvm bd9109fvm bd9110nv bd9120hfn 02.mar.2012 rev.001 tsz02201 - 0j3j0aj00090 - 1 - 2 www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 fig. 6 1 ta - ro nn, ronp fig. 6 2 ta - ven fig.59 efficiency fig.60 ta - fosc
data s heet 22 / 40 BD9106FVM bd9107fvm bd9109fvm bd9110nv bd9120hfn 02.mar.2012 rev.001 tsz02201 - 0j3j0aj00090 - 1 - 2 www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 fig. 6 3 ta - icc fig. 6 4 vcc - fosc fig. 6 5 soft start waveform fig. 6 6 sw waveform io=10ma
data s heet 23 / 40 BD9106FVM bd9107fvm bd9109fvm bd9110nv bd9120hfn 02.mar.2012 rev.001 tsz02201 - 0j3j0aj00090 - 1 - 2 www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 fig.6 7 sw waveform io=500ma fig. 6 8 transient response io=100 600ma(10s) 100ma(10s)
data s heet 24 / 40 BD9106FVM bd9107fvm bd9109fvm bd9110nv bd9120hfn 02.mar.2012 rev.001 tsz02201 - 0j3j0aj00090 - 1 - 2 www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 bd9120hfn fig.70 vcc - vout f ig. 7 3 ta - vout fig. 7 2 iout - vout fig. 7 1 ven - vout
data s heet 25 / 40 BD9106FVM bd9107fvm bd9109fvm bd9110nv bd9120hfn 02.mar.2012 rev.001 tsz02201 - 0j3j0aj00090 - 1 - 2 www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 fig. 7 4 efficiency fig.7 7 ta - ven fig. 7 5 ta - fosc fig.7 6 ta - ronn, ronp
data s heet 26 / 40 BD9106FVM bd9107fvm bd9109fvm bd9110nv bd9120hfn 02.mar.2012 rev.001 tsz02201 - 0j3j0aj00090 - 1 - 2 www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 fig. 7 8 ta - icc fig.79 vcc - fosc fig.80 soft start waveform fig. 8 1 sw waveform io=10ma
data s heet 27 / 40 BD9106FVM bd9107fvm bd9109fvm bd9110nv bd9120hfn 02.mar.2012 rev.001 tsz02201 - 0j3j0aj00090 - 1 - 2 www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 fig.8 2 sw waveform io=200ma fig. 8 3 transient response io=10 0 600ma(10s)
data s heet 28 / 40 BD9106FVM bd9107fvm bd9109fvm bd9110nv bd9120hfn 02.mar.2012 rev.001 tsz02201 - 0j3j0aj00090 - 1 - 2 www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 application information operation BD9106FVM,bd9107fvm,bd9109fvm,bd9110nv,bd9120hfn are a synchronous rectifying step - down switching regulator that achieves faster transient re sponse by employing current mode pwm control system. it utilizes switching operation in pwm (pulse width modulation) mode for heavier load, while it utilizes sllm tm (simple light load mode) operation for lighter load to improve efficiency. synchronous rectifier it does not require the power to be dissipated by a rectifier externally connected to a conventional dc/dc converter ic, and its p.n junction shoot - through protection circuit limits the shoot - through current during operation, by which the power d issipation of the set is reduced. current mode pwm control synthesizes a pwm control signal with a inductor current feedback loop added to the voltage feedback. ? pwm (pulse width modulation) control the oscillation frequency for pwm is 1 mhz. set signal form osc turns on a p - channel mos fet (while a n - channel mos fet is turned off), and an inductor current i l increases. the current comparator (current comp) receives two signals, a current feedback control signal (sense: voltage converted from i l ) and a voltage feedback control signal (fb ), and issues a reset signal if both input signals are identical to each other, and turns off the p - channel mos fet (while a n - channel mos fet is turned on) for the rest of the fixed period. the pwm control repeat this operation. ? sllm tm (simple light load mode) control when the control mode is shifted from pwm for heavier load to the one for lighter load or vise versa, the switching pulse is designed to turn off with the device held operated in normal pwm control loop, which allow s linear operation without voltage drop or deterioration in transient response during the mode switching from light load to heavy load or vise versa. although the pwm control loop continues to operate with a set signal from osc and a reset signal from curr ent comp, it is so designed that the reset signal is held issued if shifted to the light load mode, with which the switching is tuned off and the switching pulses are thinned out under control. activating the switching intermittently reduces the switching dissipation and improves the efficiency. fig.8 5 diagram of current mode pwm control osc level shift driver logic r q s i l sw ith current comp gm amp. set reset fb load sense v out v out fig.86 pwm switching timing chart fig.87 sllm switching timing chart current comp set reset sw v out pvcc gnd gnd gnd i l (ave) v out (ave) sense fb current comp set reset sw v out pvcc gnd gnd gnd 0a v out (ave) sense fb i l not switching i l
data s heet 29 / 40 BD9106FVM bd9107fvm bd9109fvm bd9110nv bd9120hfn 02.mar.2012 rev.001 tsz02201 - 0j3j0aj00090 - 1 - 2 www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 description of operations ? soft - start function en terminal shifted to high activates a soft - starter to gradually establish the output v oltage with the current limited during startup, by which it is possible to prevent an overshoot of output voltage and an inrush current. ? shutdown function with en terminal shifted to low, the device turns to standby mode, and all the function blocks inc luding reference voltage circuit, internal oscillator and drivers are turned to off. circuit current during standby is 0 a (typ.). ? uvlo function detects whether the input voltage sufficient to secure the output voltage of this ic is supplied. and the hy steresis width of 50 to 300 mv (typ.) is provided to prevent output chattering. *soft start time(typ.) fig.8 8 soft start, shutdown, uvlo timing chart BD9106FVM bd9107fvm bd9109fvm bd9110nv bd9120hfn unit tss 3 1 1 5 1 msec ? short - c urrent protection circuit with time delay function turns off the output to protect the ic from breakdown when the incorporated current limiter is activated continuously for the fixed time(t latch ) or more. the output thus held tuned off may be recovered by restarting en or by re - unlocking uvlo. *timer latch time (typ.) fig.8 9 short - current protection circuit with time delay timing chart BD9106FVM bd9107fvm bd9109fvm bd9110nv bd9120hfn uni t t latch 1 1 2 1 2 msec in addition to current limit circuit, output short detect circuit is built in on bd9109fvm and bd9120hfn. if output voltage f all below 2v(typ, bd9109fvm) or vout0.5(typ,bd9120hfn), output voltage will hold turned off. hysteresis 50 to 300mv tss tss tss soft start standby mode op erating mode standby mode operating mode standby mode operating 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
data s heet 30 / 40 BD9106FVM bd9107fvm bd9109fvm bd9110nv bd9120hfn 02.mar.2012 rev.001 tsz02201 - 0j3j0aj00090 - 1 - 2 www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 info rmation on advantages advantage 1 offers fast transient response with current mode control system. voltage drop due to sudden change in load was reduced by about 40%. fig.90 comparison of transient response advantage 2 offers high effici ency for all load range. ? for lighter load: utilizes the current mode control mode called sllm tm for lighter load, which reduces various dissipation 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 degradation in efficiency for lighter load. achieves efficiency improvement for lighter load. ? for heavier load: utilizes the synchronous rectifying mode and the low on - resistance mos fets incorporated as power transistor. on resistance of p - channel mos fet: 0.2 to 0.35 ? (typ.) on resistance of n - channel mos fet: 0.15 to 0.25 ? (typ.) achieves efficiency improvement for heavier load. offers high efficiency for all load rang e with the improvements mentioned above. advantage 3 ? supplied in smaller package due to small - sized power mos fet incorporated. (3 package like mosp8, hson8, son008v5060) ? allows reduction in size of application products reduces a mounting area required. fig.92 example application conventional product (vout of which is 3.3 volts) b d9109fvm (load response i o =100ma v out i out 228mv v out i out ? output capacitor co required for current mode control: 10 f ceramic capacitor ? inductance l required for the operating frequency of 1 mhz: 4.7 h d c/dc convertor controller r ith l co v out c ith v cc cin 10mm 15mm r ith c ith c in c o l 0.001 0.01 0.1 1 0 50 100 pwm sllm tm inprovement by sllm system improvement by synchronous rectifier efficiency [%] output current io[a] fig.91 efficiency
data s heet 31 / 40 BD9106FVM bd9107fvm bd9109fvm bd9110nv bd9120hfn 02.mar.2012 rev.001 tsz02201 - 0j3j0aj00090 - 1 - 2 www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 switching regulator efficency efficiency ? may be expressed by the equation shown below: efficiency may be improved by reducing the switching regulator power dissipation factors p d as follows: dissipation factors: 1) on resistance dissipation of inductor and fet pd(i 2 r) 2) gate charge/discharge dissipation pd(gate) 3) switching dissipation pd(sw) 4) esr dissipation of capacitor pd(esr) 5) operating current dissipation of ic pd(ic) 1)p d(i 2 r)=i out 2 (r coil+ r on ) (r coil [] dc resistance of inductor, r on [] on resistance of feti out [a] output current.) 2)pd(gate)=cgsfv 2 (cgs[f] gate capacitance of fet,f[h] switching frequency,v[v] gate driving voltage of fet) 4)pd(esr)=i rms 2 esr (i rms [a] ripple current of capacitor,esr[] equivalent series resistance.) 5)pd(ic)=vini cc (i cc [a] circuit current.) as this ic functions with high efficiency without significant heat generation i n 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 d issipation 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. because the conduction losses are considered to play the leading role among other dissipation mentioned above including gate charge/discharge dissipation and switching dissipation. if v cc =5v, v out =3.3v, r coil =0.15, r onp =0.35, r onn =0.25 i out =0.8a, for example, d=v out /v cc =3.3/5=0.66 r on =0.660.35+(1 - 0.66)0.25 =0.231+0.085 =0.316[] p=0.8 2 (0.15+0.316) P 298[mv] as r onp is greater than r onn in this ic, the dissipation increases as the on duty becomes greate r. with the consideration on the dissipation as above, thermal design must be carried out with sufficient margin allowed. = out i out viniin 100[%]= p out pin 100[%]= p out p out +p d 2 c rss i out f i drive 3)pd(sw)= (c rss [f] drive [a] 0 25 50 75 100 125 150 0 200 400 600 800 1000 85 387.5mw 587.4mw mounted on glass epoxy pcb j - a=212.8 /w using an ic alone j - a=32 2.6 /w power dissipation:pd [mw] ambient temperature:ta [ ] fig.9 3 thermal derating curve (msop8) ambient temperature:ta [ ] 0 25 50 75 100 125 150 0 0.5 1.0 1.5 0.64w 0.90w power dissipation:pd [w] ambient temperature:ta [ ] fig.9 5 thermal derating curve (son008v5060) for son008v5060 rohm standard 1layer board j - a=138.9 /w using an ic alone j - a=195.3 /w 0 25 50 75 100 125 150 0 0.5 1.0 1.5 0.63w 1.15w power dissipation:pd [w] fig.9 4 thermal derating curve (hson8) mounted on glass epoxy pcb j - a=133.0 /w using an ic alone j - a=195.3 /w 85 105 p=i out 2 (r coil +r on ) r on =dr onp +(1 - d)r onn d out /v cc ) r coil onp onn out
data s heet 32 / 40 BD9106FVM bd9107fvm bd9109fvm bd9110nv bd9120hfn 02.mar.2012 rev.001 tsz02201 - 0j3j0aj00090 - 1 - 2 www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 selection of components externally connected 1. selection of inductor (l) * current exceeding the current rating of the inductor results in magnetic saturation of the inductor, which decreases efficiency. the inductor must be selected allowing sufficient margin with which the peak current may not exceed its current rating. if v cc =5v, v out =3.3v, f=1mhz, i l =0.30. 8a=0.24a, for example,(bd9109fvm) * 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 ) as the output rise time mu st be designed to fall within the soft - start time, the capacitance of output capacitor should be determined with consideration on the requirements of equation (5): in case of bd9109fvm, for instance, and if v out =3.3v, i out =0.8a, and t ss =1ms, inappr opriate capacitance may cause problem in startup. a 10 f to 100 f ceramic capacitor is recommended. 3. selection of input capacitor (cin) a low esr 10f/10v ceramic capacitor is recommended to reduce esr dissipation of input capacitor for better efficiency. the inductance sign ificantly depends on output ripple current. as seen in the equation (1), the ripple current decreases as the inductor and/or switching frequency increases. i l = (v cc - v out )v out lv cc f [a] ?? ? i l =0.3i out max. [a] ??? cc - v out )v out i l v cc f [h] ??? (i l : output ripple current, and f: switching frequency) output capacitor should be selected with the consideration on the stability region and the equivalent series resistance required to smooth ripple voltage. output ripple voltage is determined by the equation (4) v out =i l esr [v] ??? (i l : output ripple current, esr: equivalent series resistance of output capacitor) *rating of the capacitor should be determined allowing sufficient margin against output voltage. less esr allows reduction in output ripple v oltage. input capacitor to select must be a low esr capacitor of the capacitance sufficient to cope with high ripple current to prevent high transient voltage. the ripple current i rms is given by the equation (6): i rms =i out v out (v cc - v out ) v cc [a] ??? rms = i out 2 fig.9 7 output capacitor (5 - 3.3)3.3 0.2451m l = =4.675 4.7[h] rms(max.) if v cc =5v, v out =3.3v, and i outmax.= 0.8a, (bd9109fvm) i rms =0.8 3.3(5 - 3.3) 5 =0.38[a rms ] Q ss (i limit - i out ) v out ??? limit : over current detection level, 2a(typ) fig.9 8 input capacitor i l fig.96 output ripple current i l v cc il l co vout v cc l co v out esr co Q P 364 [f] v cc l co v out cin
data s heet 33 / 40 BD9106FVM bd9107fvm bd9109fvm bd9110nv bd9120hfn 02.mar.2012 rev.001 tsz02201 - 0j3j0aj00090 - 1 - 2 www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 4. determination of r ith , c ith that works as a phase compensator as the current mode control is designed to limit a inductor current, a pole (phase lag) appears in the low frequency area due to a cr filter consistin g of a output capacitor and a load resistance, while a zero (phase lead) appears 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 descr ibed below to cancel a pole at the power amplifier. stable feedback loop may be achieved by canceling the pole fp (min.) produced by the output capacitor and the load resistance with cr zero correc tion by the error amplifier. 5. determination of output voltage the output voltage v out is determined by the equation (7): v out =(r2/r1+1)v adj ??? (7) v adj : voltage at adj terminal (0.8v typ.) with r1 and r2 adjusted, the output voltage may be determined as required. 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 f or r1. if a resistor of the resistance higher than 100 k? is used, check the assembled set carefully for ripple voltage etc. fig.10 2 determination of output voltage fig.9 9 open loop gain characteristics fig. 100 error amp phase compensation characteristics fp= 2r o c o 1 fz (esr) = 2e sr c o 1 pole at power amplifier when the output current decreases, the load resistance ro increases and the pole frequency lowers. fp (min.) = 2r omax. c o 1 [hz]with lighter load (max.) = 2r omin. c o 1 [hz]with heavier load (amp.) = 2r ith. c ith 1 gnd,pgnd sw v cc ,pv cc en v out ith v cc v out cin r ith c ith l esr c o r o v out fig.10 1 typical application fz (amp.) = fp (min.) 2r ith c ith 1 = 2r omax. c o 1 sw adj l co r2 r1 output gain [db] phase [deg] a 0 0 - 90 a 0 0 - 90 fz(amp.) fp(min.) fp(max.) fz(esr) i out min. i out max. gain [db] phas e [deg]
data s heet 34 / 40 BD9106FVM bd9107fvm bd9109fvm bd9110nv bd9120hfn 02.mar.2012 rev.001 tsz02201 - 0j3j0aj00090 - 1 - 2 www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 cautions on pc board layout BD9106FVM, bd9107fvm, bd9109fvm, bd9120hfn fig.103 layout diagram bd9110nv cautions on pc board layout fig.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 co 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. 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. recommended components lists on above application table1. [BD9106FVM] symbol part value manufacturer ser ies l coil 4.7h in ceramic capacitor 10f o ceramic capacitor 10f ith ceramic capacitor 750pf murata grm18series r ith resistance v out =1.0v 18k out =1.2v 22k out =1.5v 22k out =1.8v 27k out =2.5v 36k out /adj ith en gnd v cc pv cc sw pgnd c o gnd v out v cc l ith c ith c in cc ith gnd en pv cc sw pgnd v cc r ith gnd c o c in v out en l c ith 2 r 1
data s heet 35 / 40 BD9106FVM bd9107fvm bd9109fvm bd9110nv bd9120hfn 02.mar.2012 rev.001 tsz02201 - 0j3j0aj00090 - 1 - 2 www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 table2. [bd9107fvm] symbol part value manufacturer series l coil 4.7h in ceramic capacitor 10f o ceramic capacitor 10f ith ceramic capacitor 1000pf murata grm18series r ith resistance v out =1.0v 4.3k out =1.2v 6.8k out =1. 5v 9.1k out =1.8v 12k 4.7h in ceramic capacitor 10f o ceramic capacitor 10f ith ceramic capacitor 330pf murata grm18series r ith resistance 30k 2.2h in ceramic capacitor 10f o ceramic capacitor 22f ith ceramic capacitor 1000pf murata grm18series r ith resistance v out =1.0v 12k out =1.2v v out =1.5v v out =1.8v v out =2.5v table5. [bd9120hfn] symbol part value ma nufacturer series l coil 4.7h in ceramic capacitor 10f o ceramic capacitor 10f ith ceramic capacitor 680pf murata grm18series r ith resistance v out =1.0v 8. 2k out =1.2v 8.2k out =1.5v 4.7k *the parts list presented above is an example of recommended parts. although the parts are sound, actual circuit characterist ics should be checked on your applicatio n carefully before use. be sure to allow sufficient margins to accommodate variations between external devices and this ic wh en employing the depicted circuit with other circuit constants modified. both static and transient characteristics should be consid ered in establishing these margins. when switching noise is substantial and may impact the system, a low pass filter should be inserted between the vcc and pvcc pins, and a schottky barrier diode established between the sw and pgnd pins.
data s heet 36 / 40 BD9106FVM bd9107fvm bd9109fvm bd9110nv bd9120hfn 02.mar.2012 rev.001 tsz02201 - 0j3j0aj00090 - 1 - 2 www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 i/o equivalence circuit BD9106FVM, bd9107fvm, bd9109fvm bd9110nv, bd9120hfn fig.105 i/o equivalence circuit v cc en 10k ? en pin v cc adj 10k ? adj pin (BD9106FVM, bd9107fvm) v cc v out 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
data s heet 37 / 40 BD9106FVM bd9107fvm bd9109fvm bd9110nv bd9120hfn 02.mar.2012 rev.001 tsz02201 - 0j3j0aj00090 - 1 - 2 www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 operational notes 1. absolute maximum ratings while utmost care is taken to quality control of this product, any application that may exceed some of the absolute maximum ratings including the voltage applied and the operating temperature range may result in breakage. if broken, short - mode or open - mode may not be identif ied. so if it is expected to encounter with special mode that may exceed the absolute maximum ratings, it is requested to take necessary safety measures physically including insertion of fuses. 2. electrical potential at gnd gnd must be designed to have the lowest electrical potential in any operating conditions. 3. short - circuiting between terminals, and mismounting when mounting to pc board, care must be taken to avoid mistake in its orientation and alignment. failure to do so may result in ic breakd own. short - circuiting due to foreign matters entered between output terminals, or between output and power supply or gnd may also cause breakdown. 4.operation in strong electromagnetic field } be noted that using the ic in the strong electromagnetic radia tion can cause operation failures. 5. thermal shutdown protection circuit thermal shutdown protection circuit is the circuit designed to isolate the ic from thermal runaway, and not intended to protect and guarantee the ic. so, the ic the thermal shutdow n protection circuit of which is once activated should not be used thereafter for any operation originally intended. 6. inspection with the ic set to a pc board if a capacitor must be connected to the pin of lower impedance during inspection with the ic s et to a pc board, the capacitor must be discharged after each process to avoid stress to the ic. for electrostatic protection, provide proper grounding to assembling processes with special care taken in handling and storage. when connecting to jigs in th e inspection process, be sure to turn off the power supply before it is connected and removed. 7. input to ic terminals this is a monolithic ic with p + isolation between p - substrate and each element as illustrated below. this p - layer and the n - layer of e ach element form a p - n junction, and various parasitic element are formed. if a resistor is joined to a transistor terminal as shown in fig 106 : p - n junction works as a parasitic diode if the following relationship is satisfied; gnd>terminal a (at resisto r side), or gnd>terminal b (at transistor side); and if gnd>terminal b (at npn transistor side), a parasitic npn transistor is activated by n - layer of other element adjacent to the above - mentioned parasitic diode. the structure of the ic inevitably form s parasitic elements, the activation of which may cause interference among circuits, and/or malfunctions contributing to breakdown. it is therefore requested to take care not to use the device in such manner that the voltage lower than gnd (at p - substrate ) may be applied to the input terminal, which may result in activation of parasitic elements. fig. 106 simplified structure of monorisic ic 8. ground wiring pattern if small - signal gnd and large - current gnd are provided, it will be recommended to separate the large - current gnd pattern from the small - signal gnd pattern and establish a single ground at the reference point of the set pcb so that resistance to the wiring pattern and voltage fluctuations due to a large current will cause no fluctuat ions in voltages of the small - signal gnd. pay attention not to cause fluctuations in the gnd wiring pattern of external parts as well. status of this document the japanese version of this document is formal specification. a customer may use this translatio n version only for a reference to help reading the formal version. if there are any differences in translation version of this document formal version takes priority.
38 / 40 BD9106FVM bd9107fvm bd9109fvm bd9110nv bd9120hfn data s heet 02.mar.2012 rev.001 www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 tsz02201 - 0j3j0aj00090 - 1 - 2 physical dimension s tape and reel information
39 / 40 BD9106FVM bd9107fvm bd9109fvm bd9110nv bd9120hfn data s heet 02.mar.2012 rev.001 www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 tsz02201 - 0j3j0aj00090 - 1 - 2 marking diagrams BD9106FVM bd910 7fvm bd910 9 fvm bd9110nv bd9120hfn msop8(top view) d 9 1 part number mar king lot number 1pin mark 0 6 hson8 (top view) 2 0 part number marking l ot 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
40 / 40 BD9106FVM bd9107fvm bd9109fvm bd9110nv bd9120hfn data s heet 02.mar.2012 rev.001 www.rohm.com ? 2012 rohm co., ltd. all rights reserved. tsz22111 ? 15 ? 001 tsz02201 - 0j3j0aj00090 - 1 - 2 revision history date revision changes 17.jan.2012 001 new release
datasheet d a t a s h e e t notice - rev.001 notice precaution for circuit design 1) the products are designed and produced for applicatio n in ordinary electronic equipment (av equipment, oa equipment, telecommunication equipment, home appliances, amusement equipment, etc.). if the products are to be used in devices requiring extremel y high reliability (medical equipment, transport equipment, aircraft/spacecraft, nuclear power controllers, fuel contro llers, car equipment including car accessories, safety devices, etc.) and whose malfunction or operational error may endanger human life and sufficient fail-safe measures, please consult with the rohm sales staff in advance. if product malfunctions may re sult in serious damage, including that to human life, sufficient fail-safe measures must be taken, including the following: [a] installation of protection circuits or other protective devices to improve system safety [b] installation of redundant circuits in the case of single-circuit failure 2) the products are designed for use in a standard environment and not in any spec ial environments. a pplication of the products in a special environment can deteriorate product per formance. accordingly, verification and confirmation of product performance, prior to use, is recomm ended if used under the following conditions: [a] use in various types of liquid, includin g water, oils, chemicals, and organic solvents [b] use outdoors where the products are exposed to direct sunlight, or in dusty places [c] use in places where the products are exposed to sea winds or corrosive gases, including cl 2 , h 2 s, nh 3 , so 2 , and no 2 [d] use in places where the products are exposed to static electricity or electromagnetic waves [e] use in proximity to heat-producing componen ts, plastic cords, or other flammable items [f] use involving sealing or coating the prod ucts with resin or other coating materials [g] use involving unclean solder or use of water or water-soluble cleaning agents for cleaning after soldering [h] use of the products in places subject to dew condensation 3) the products are not radiation resistant. 4) verification and confirmation of performance characte ristics of products, after on- board mounting, is advised. 5) in particular, if a transient load (a large amount of load applied in a short per iod of time, such as pulse) is applied, confirmation of performance characteristics after on-boar d mounting is strongly recomm ended. avoid applying power exceeding normal rated power; exceeding the power rating under steady-state loading c ondition may negatively affect product performance and reliability. 6) de-rate power dissipation (pd) depending on ambient temperature (ta). when used in sealed area, confirm the actual ambient temperature. 7) confirm that operation temper ature is within the specified range described in product specification. 8) failure induced under deviant condition from what def ined in the product specific ation cannot be guaranteed. precaution for mounting / circuit board design 1) when a highly active halogenous (chlori ne, bromine, etc.) flux is used, the remainder of fl ux may negatively affect product performance and reliability. 2) in principle, the reflow soldering method must be used; if flow soldering method is preferred, please consult with the company in advance. regarding precaution for mounting / circu it board design, please specially refe r to rohm mounting specification precautions regarding application examples and external circuits 1) if change is made to the constant of an external circuit, allow a sufficient margin due to variations of the characteristics of the products and external components, including transient characteristics, as well as static characteristics. 2) the application examples, their const ants, and other types of information cont ained herein are applicable only when the products are used in accordance with standard methods . therefore, if mass production is intended, sufficient consideration to external conditions must be made.
datasheet d a t a s h e e t notice - rev.001 precaution for electrostatic this product is electrostatic sensitive product, which may be damaged due to electrostatic discharge. please take proper caution during manufacturing and st oring so that voltage exceeding product ma ximum rating won't be applied to products. please take special care under dry condition (e.g. grounding of human body / equipment / so lder 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 following places: [a] where the products are exposed to sea winds or corrosive gases, including cl2, h2s, nh3, so2, and no2 [b] where the temperature or humidity exceeds those recommended by the company [c] storage in direct sunshine or condensation [d] storage in high electrostatic 2) even under rohm recommended storage c ondition, solderability of products out of recommended storage time period may be degraded. it is strongly recommended to confirm sol derability before using products of which storage time is exceeding recommended storage time period . 3) store / transport cartons in the correct direction, whic h is indicated on a carton as a symbol. otherwise bent leads may occur due to excessive stress applied when dropping of a carton. 4) use products within the specified time after opening a dry bag. precaution for product label qr code printed on rohm product label is only for internal us e, and please do not use at cust omer site. it might contain a internal part number that is inconsistent with an product part number. precaution for disposition when disposing products please dispose them properly with a industry waste company. precaution for foreign exchange and foreign trade act since concerned goods might be fallen under controlled goods prescribed by foreign exchange and foreign trade act, please consult with rohm in case of export. prohibitions regarding industrial property 1) information and data on products, including application exam ples, contained in these specifications are simply for reference; the company does not guarantee any industrial pr operty rights, intellectual property rights, or any other rights of a third party regarding this information or data. ac cordingly, the company does not bear any responsibility for: [a] infringement of the intellectual property rights of a third party [b] any problems incurred by the us e of the products listed herein. 2) the company prohibits the purchaser of its products to exercise or use the in tellectual property rights, industrial property rights, or any other rights that either belong to or are controlled by the company, other than the right to use, sell, or dispose of the products.

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