NJU7606 , nju7608 -1- ver.2006-02-13 step-up / flyback switching regulator ic with load switch function general description package outline features product variation pwm switching control load switch function operating voltage 2.2v to 8v wide oscillator range 300khz to 1mhz maximum duty cycle 90% typ. quiescent current operating: 800 a typ. standby: 1 a max. soft-start function internal : 16ms typ. or adjustable dead time control timer latch for short circuit protection c-mos technology package outline NJU7606rb2 : tvsp10 nju7608pb1 : ffp12 -b1 pin configuration NJU7606/08 is a high speed low voltage operation switching regulator control ic with load switch function. it features a which disconnects load from input during standby and also provides latch mode. NJU7606rb2 nju7608pb1 NJU7606 nju7608 NJU7606 small pkg nju7602 load sw, standby function standby function NJU7606rb2 1 10 2 9 3 8 4 7 5 6 pin function 1. v + 2. lsw 3. fb 4. in - 5. scp 6. on/off 7. dtc 8. rt 9. gnd 10. out nju7608pb1 pin function 1. gnd 2. rt 3. dtc 4. on/off 5. scp 6. in - 7. fb 8. lsw 9. v + 10. n.c. 11. out 12. n.c. top under 1 23 4 5 6 7 8 9 10 11 12 321 12 9 8 7 6 5 4 11 10 top under 1 23 4 5 6 7 8 9 10 11 12 321 12 9 8 7 6 5 4 11 10 1 23 4 5 6 7 8 9 10 11 12 321 12 9 8 7 6 5 4 11 10
NJU7606 , nju7608 - 2 - ver.2006-02-13 block diagram buffer 0.74v 0.5v osc 1v 0.5 r t a 2k ? 2 ? amp latch standby on/off on/off high: on low : off (standby) lsw
NJU7606 , nju7608 - 3 - ver.2006-02-13 absolute maximum ratings (ta=25c) parameter symbol maximum ratings unit supply voltage v + +9 v lsw output voltage v lsw +9 v output pin current i o 50 ma lsw output current i lsw -10 ma on/off pin voltage v on/off +9 (*1) v power dissipation p d tvsp10 :320 ffp12-b1 :300 (*2) mw operating temperature range t opr -40 ~ +85 c storage temperature range t stg -40 ~ +125 c *1: when input voltage is less than 9v, the absolute maximum control voltage is equal to the input voltage. *2: on board. 25mm 25mm 0.2mm recommended operating conditions (ta=25c) parameter symbol min. typ. max. unit operating voltage v + 2.2 ? 8 v oscillator timing resistor r t 30 47 120 k ? oscillation frequency f osc 300 700 1,000 khz electrical characteristics (v + =v on/off =3.3v, r t =47k ? , ta=25 c) parameter symbol test condition min. typ. max. unit under voltage lockout block on threshold voltage v t_on v + = l h 1.9 2.0 2.1 v off threshold voltage v t_off v + = h l 1.8 1.9 2.0 v hysteresis voltage v hys 60 100 ? mv soft start block soft start time t ss v t_on duty=80% 8 16 24 ms short circuit protection block input threshold voltage v t_pc fb pin 0.95 1.00 1.05 v charge current i chg v scp =0v 1.5 2 2.5 a latch mode on threshold voltage v t_la scp pin 0.95 1.00 1.05 v latch mode off threshold voltage v t_laoff scp pin 0.2 0.45 0.7 v oscillator block rt pin voltage v rt -5% 0.5 +5% v oscillation frequency f osc 630 700 770 khz oscillate supply voltage fluctuations f dv v + =2.2v ~ 8v ? 1 ? % oscillate temperature fluctuations f dt ta = - 4 0 c ~ +85 c ? 3 ? %
NJU7606 , nju7608 - 4 - ver.2006-02-13 electrical characteristics (v + =v on/off =3.3v, r t =47k ? , ta=25 c) parameter symbol test condition min. typ. max. unit error amplifier block reference voltage v b -1.5% 1.00 +1.5% v input bias current i b -0.1 ? 0.1 a open loop gain a v ? 80 ? db gain bandwidth product g b ? 1 ? mhz i om+_1 v fb =1v, v in- =0.9v 20 45 70 ma output source current i om+_2 v fb =1v, v in- =0.9v, v + =2.2v 4 9 16 ma output sink current i om- v fb =1v, v in- =1.1v 0.10 0.16 0.22 ma pwm comparate block v t_0 duty=0% 0.16 0.22 0.28 v input threshold voltage v t_50 duty=50% 0.44 0.5 0.56 v m ax d uty_1 v fb =0.9v 85 90 95 % maximum duty cycle m ax d uty_2 v fb =0.9v, r dtc =47k ? 40 50 60 % output block output high level on resistance r oh i o =-20ma ? 10 20 ? output low level on resistance r ol i o =+20ma ? 5 10 ? load sw output block lsw output on resistance r lsw i lsw =1ma ? 55 100 ? lsw output leak current i leak_lsw v lsw =9v, v on/off =0v ? ? 0.1 a on/off block on control voltage v on v on/off = l h 1.6 ? v + v off control voltage v off v on/off = h l 0 ? 0.3 v general characteristics quiescent current i dd r l =non load ? 800 1200 a standby current i dd_stb v on/off =0v ? ? 1.0 a
NJU7606 , nju7608 - 5 - ver.2006-02-13 typical applications step-up converter (input line load sw) scp v + v out sbd in- fb v + dtc rt gnd out gnd lsw on/off fet: load sw NJU7606 nju7608 on/off high : on low : off (standby) c scp c in fet r2 r1 c out l c nf r nf r dtc c s c r t r p step-up converter (onput line load sw) scp v + v out sbd in- fb v + dtc rt gnd out gnd lsw on/off fet: load sw NJU7606 nju7608 on/off high : on low : off (standby) c scp c in fet r2 r1 c out l c nf r nf r dtc c s c r t r p
NJU7606 , nju7608 - 6 - ver.2006-02-13 typical characteristics 100 1000 10 100 oscillation frequency f osc (khz) oscillation frequency vs. timing resistance (v + =3.3v, ta=25 o c) timing resistance r t (k ? ) 80 85 90 95 100 100 1000 maximum duty cycle m ax d uty_1 (%) maximum duty cycle vs. oscillator frequency (v + =3.3v, ta=25 o c) oscillator frequency f osc (khz) 660 680 700 720 740 0246810 oscillation frequency fosc (khz) operating voltage v + (v) oscillation frequency vs. operating voltage (r t =47k ? , ta=25 o c) 0 20 40 60 80 100 0 20406080100 duty cycle m ax d uty (%) dead time control resistance r dtc (k ? ) duty cycle vs. r dtc (v + =3.3v, r t =47k ? , ta=25 o c) 0.996 0.998 1 1.002 1.004 0246810 reference voltage v b (v) operating voltage v + (v) reference voltage vs. operating voltage (ta=25 o c) (v + =3.3v, gain=40db, ta=25 o c) 0 15 30 45 60 0 45 90 135 180 0.1 1 10 100 1000 10000 error amplifier block voltage gain, phase vs. frequency phase (deg) frequency f (khz) voltage gain av (db) phase gain
NJU7606 , nju7608 -7- ver.2006-02-13 typical characteristics 0 200 400 600 800 1000 1200 1400 0246810 quiescent current i dd ( a) operating voltage v + (v) quiescent current vs. operating voltage (r t =47k ? , r l =non load, ta=25 o c) 0 0.2 0.4 0.6 0.8 1 0246810 standby current i dd_stb (na) operating voltage v + (v) standby current vs. operating voltage (r t =47k ? , v on/off =0v, ta=25 o c) 0 2 4 6 8 10 12 14 16 -50 -25 0 25 50 75 100 125 ambient temperature ta ( o c) output high level on resistance r oh ( ? ) output block output high level on resistance vs. temperature (io=-20ma) v + =3.3v v + =1.95v v + =8v 0 2 4 6 8 10 12 14 -50 -25 0 25 50 75 100 125 ambient temperature ta ( o c) output low level on resistance r ol ( ? ) output block output low level on resistance vs. temperature (io=+20ma) v + =3.3v v + =1.95v v + =8v 1 10 100 1000 -50 -25 0 25 50 75 100 125 ambient temperature ta ( o c) output source current i om+ (ma) error amplifier block output source current vs. temperature (v fb =1v, v in- =0.9v) v + =3.3v v + =1.95v v + =8v 0 0.05 0.1 0.15 0.2 -50 -25 0 25 50 75 100 125 ambient temperature ta ( o c) output sink current i om- (ma) error amplifier block output sink current vs. temperature (v fb =1v, v in- =1.1v) v + =1.95v, 3.3v, 8v
NJU7606 , nju7608 - 8 - ver.2006-02-13 typical characteristics 8 10 12 14 16 18 20 22 24 -50 -25 0 25 50 75 100 125 ambient temperature ta ( o c) soft start time tss (ms) soft start time vs. temperature (v + =3.3v) 0.99 0.995 1 1.005 1.01 -50 -25 0 25 50 75 100 125 ambient temperature ta ( o c) reference voltage v b (v) reference voltage vs. temperature (v + =3.3v) 640 660 680 700 720 740 760 -50 -25 0 25 50 75 100 125 ambient temperature ta ( o c) oscillator frequency f osc (khz) oscillator frequency vs. temperature (v + =3.3v, r t =47k ? ) 40 50 60 70 80 90 100 -50 -25 0 25 50 75 100 125 ambient temperature ta ( o c) muximum duty cycle m ax d uty (%) muximum duty cycle vs. temperature (v + =3.3v) m ax d uty_1 m ax d uty_2 1.86 1.9 1.94 1.98 2.02 2.06 -50 -25 0 25 50 75 100 125 ambient temperature ta ( o c) threshold voltage (v) under voltage lockout block vs. temperature v t_off v t_on
NJU7606 , nju7608 - 9 - ver.2006-02-13 typical characteristics 0 20 40 60 80 100 120 140 160 -50 -25 0 25 50 75 100 125 ambient temperature ta ( o c) lsw output on resistance r lsw ( ? ) lsw output on resistance vs. temperature (i lsw =1ma) v + =3.3v v + =1.95v v + =8v 0.01 0.1 1 10 100 -50 -25 0 25 50 75 100 125 ambient temperature ta ( o c) lsw output leak current i leak_lsw (na) lsw output leak current vs. temperature (v + =3.3v, r t =47k ? , v lsw =9v, v on/off =0v) 0 200 400 600 800 1000 -50 -25 0 25 50 75 100 125 ambient temperature ta ( o c) quiescent current i dd ( a) quiescent current vs. temperature (v + =3.3v, r t =47k ? ) 0 0.2 0.4 0.6 0.8 1 -50 -25 0 25 50 75 100 125 ambient temperature ta ( o c) standby current i dd_stb ( a) standby current vs. temperature (v + =3.3v, r t =47k ? , v on/off =0v) 0.6 0.65 0.7 0.75 0.8 0.85 0.9 0.95 1 -50 -25 0 25 50 75 100 125 ambient temperature ta ( o c) on/off control voltage v on/off (v) on/off control voltage vs. temperature (v + =3.3v) v on v off
NJU7606 , nju7608 - 1 0 - ver.2006-02-13 memo [caution] the specifications on this databook are only given for information , without any guarantee as regards either mistakes or omissions. the application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights. [caution] the specifications on this databook are only given for information , without any guarantee as regards either mistakes or omissions. the application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights.
|
