AP1624 pwm/pfm dual mode step -up dc/dc controller AP1624 rev. 1 1 of 7 february 2007 www.diodes.com ? diodes incorporated lead-free ? input voltage range: 0.9~6v ? pwm/pfm switching control ? high efficiency: 90% ? oscillator frequency: 300khz 15% ? stand-by current: i stb = 3a typ. ? lead free finish/rohs compliant for lead free products (note 1) ? lead free package: sot25 the AP1624 is a multi-functional step-up dc/dc controller. large output current is possible using an externally connected n channel mosfet, coil, and diode. output voltage v out is programmable with 1.23v of standard voltage supply internal, and using externally connected components, output voltage fb can be set up at will. with a 300khz switching frequency, the size of the external components can be reduced. control switches from pfm to pwm during light loads with the AP1624 pfm/pwm switchable and the series is highly efficient from light loads to large output currents. during stand-by time (ce pin ?low?), current consumption is reduced to 3a. applications ? electronic information organizers ? palmtops ? cellular and portable phones ? portable audio systems ? various multi-function power supplies AP1624 x x x w : sot25 packing -7 : taping package lead-free l: lead free note: 1. rohs revision 13.2.2003. glass and hi gh temperature solder exemptions applied, see eu directive annex notes 5 and 7 . 7? tape and reel device package code packaging (note 2) quantity part number suffix AP1624w w sot25 3000/tape & reel -7 note: 2. pad layout as shown on diodes inc. suggested pad layout document ap02001, which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf . features general description ordering information not recommended for new designs
AP1624 pwm/pfm dual mode step -up dc/dc controller AP1624 rev. 1 2 of 7 february 2007 www.diodes.com ? diodes incorporated 1 3 2 5 4 fb v cc ext ce gnd sot25 (top view) pin no. pin name function 1 fb feedback pin 2 v cc ic power supply pin 3 ce chip enable: h: enable l: disable 4 gnd gnd pin 5 ext external n-mosfet connection phase compensation vref with ce + - pwm/pfm controller + - ramp wave generator, osc buffer, driver fb ce gnd ext v cc pwm comparator pin assignments pin descriptions block diagram not recommended for new designs
AP1624 pwm/pfm dual mode step -up dc/dc controller AP1624 rev. 1 3 of 7 february 2007 www.diodes.com ? diodes incorporated absolute maximum ratings t a = 25 o c parameter symbol ratings units v in pin voltage v cc -0.3 ~ 6.5 v fb pin voltage v fb -0.3 ~ v cc + 0.3 v ce pin voltage v ce -0.3 ~ v cc + 0.3 v ext pin voltage v ext -0.3 ~ v cc + 0.3 v ext pin current i ext 100 ma operating junction temperature t op -30 ~ +105 o c storage temperature t st -40 ~ +125 o c electrical characteristics v in = 3.3v, v out = 5v, load = 300 ma t a = 25 o c parameter symbol conditions min. typ. max. units fb voltage v fb 1.205 1.23 1.255 v maximum input voltage v cc 6 - - v supply current 1 i cc1 no external components, ce = v in , v fb = 1.5v - 50 100 a supply current 2 i cc2 no external components, ce = v in , v fb = 0v - 100 200 a stand-by current i stb no external components, ce = 0v, v fb = 0.5v - 3 - a oscillator frequency fosc 200 300 350 khz maximum duty cycle dc max no external components v cc = 5v, v fb = 0v 80 - - % pfm duty cycle dc pfm no load 15 25 35 % ce ?high? voltage v ceh apply above 0.65vcc (min.) to ce, operating mode 0.65 - - *vcc ce ?low? voltage v cel apply under 0.2vcc (min.) to ce, standby mode - - 0.20 *vcc ext source current i source v ce = v in , v fb = 0v, v ext = v cc -0.4v - 40 - ma ext sink current i sink v ce = v in , v fb = 2v, v ext = 0.4v - 70 - ma efficiency - 90 - % not recommended for new designs
AP1624 pwm/pfm dual mode step -up dc/dc controller AP1624 rev. 1 4 of 7 february 2007 www.diodes.com ? diodes incorporated typical application circuit (1) normal circuit r1 nmos af2302 2.5v~5.5v ext ce fb gnd v cc ss240 10 h v in 100k 0.1 r2 v out 470 470 0.1 100 0.1 0.1 v out = 1.23 (1+ r2 r1 ), r2 = 10k ~ 20k (2) lv circuit 220k 0.9v~2.5 v ex t ce fb gnd v c c schottky diode 0.1 130k c p 3.3v 4 7 g 4 7 g g l 100k npn c b r b v ou t v i n r b = adjust according to load and tr. hfe levels c b 1 / ( 2 r b f osc 0.7 ) (3) hv circuit 330k fds6612 above to 5v ext ce fb gnd v cc ss240 10 h v in 100k 0.1 v out 470 0.1 470 0.1 r 24v/1a zd 5v 18k not recommended for new designs
AP1624 pwm/pfm dual mode step -up dc/dc controller AP1624 rev. 1 5 of 7 february 2007 www.diodes.com ? diodes incorporated typical performance characteristics AP1624 load regulation 11.5 11.6 11.7 11.8 11.9 12 12.1 12.2 12.3 12.4 12.5 0 200 400 600 800 1000 load (ma) v out (v) vcc=5v,vout=12v AP1624 load regulation 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 5 0 200 400 600 800 1000 1200 load (ma) vout (v) vcc=3.3v,vout=5v AP1624 line regulation 4.5 4.6 4.7 4.8 4.9 5 5.1 5.2 5.3 5.4 5.5 2.5 3 3.5 4 vcc (v) vout (v) vcc=3.3v,vout=5v 8.0 8.2 8.4 8.6 8.8 9.0 9.2 9.4 9.6 9.8 10.0 -50 -25 0 25 50 75 100 temperature ( o c) vout (v) AP1624 temperature vs. vout vcc=5v, iout=300ma 250 260 270 280 290 300 310 320 330 340 350 0 0.2 0.4 0.6 0.8 1 1.2 AP1624 load vs. frequency vcc = 3.3v frequency (khz) load (a) AP1624 vcc vs. frequency 200 230 260 290 320 350 380 410 2.533.544.555.5 vcc (v) frequency (khz) not recommended for new designs
AP1624 pwm/pfm dual mode step -up dc/dc controller AP1624 rev. 1 6 of 7 february 2007 www.diodes.com ? diodes incorporated typical performance characteristics ( continued ) 60 70 80 90 100 0 0.2 0.4 0.6 0.8 1 1.2 load (a) efficiency (%) AP1624 load vs. efficiency vcc=3.3v, vout=5v vcc=5v, vout=12v 0 100 200 300 400 500 -50 -25 0 25 50 75 100 temperature ( o c) frequency (khz) AP1624 temperature vs. frequency 0 30 60 90 120 150 180 210 1.5 2.5 3.5 4.5 5.5 AP1624 vcc vs. supply current vcc (v) supply current (ua) no outs ide cir c uit, v fb =1.5v 60 70 80 90 100 -50 -25 0 25 50 75 100 temperature ( o c) efficiency(%) AP1624 temperature vs. efficiency vcc=5v,vout=12v, iout=300ma marking information xx : identification code y : year: 0-9 m : month: a~l sot25 xx y m 7 1 2 3 4 5 part number package identification code AP1624 sot25 eq not recommended for new designs
AP1624 pwm/pfm dual mode step -up dc/dc controller AP1624 rev. 1 7 of 7 february 2007 www.diodes.com ? diodes incorporated package information ( unit: mm ) package type: sot25 important notice life support diodes incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or ot her changes without further notice to any product herein. diodes incorporated does not assume any liability arising out of the application or use of any pr oduct described herein; neither does it convey any license under its patent rights, nor the rights of others. the user of products in such applications shall assume all risks of such use and will agree to hold diodes incorporated and all the companies whose products are represented on our website, harmless against all dam ages. diodes incorporated products are not authorized for use as critical components in life support devices or systems without the e xpressed written approval of the president of diodes incorporated. not recommended for new designs
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