ver: 1.2 jul 08, 2010 tel: 886-3-5788833 http://www.gmt.com.tw 1 G5125 global mixed-mode technology inc. micro-power boost dc/dc converter features ? operating voltage 2.7v ~ 5.5v ? high operating frequency 1mhz ? shutdown current 1 a ? high output voltage up to 30v ? soft start function ? cycle by cycle current limiting ? sot-23-5 package applications ? stn/oled bias ? personal digital assistants ? dsc general description the G5125 boost converter contains a 0.7 internal switch. the ic operates at constant frequency 1mhz, allowing the use of tiny, low cost and low height in- ductors and capacitors. the ic operates from a 2.7v to 5.5v supply voltage and can boost supply voltage up to 30v at the output. high inrush current at start-up is eliminated using the soft-start function. constant frequency current mode pwm architecture results in low, predictable output noise. the G5125 includes cycle-by-cycle 850ma current limiting to maximum inductor current and over-temperature protection cir- cuit. the G5125 is suitable for small or medium size lcd panel of high bias voltage with a constant current to provide pdas, and other portable devices. the G5125 is available in sot-23-5 package. ordering information order number marking temp. range package (green) G5125t11u 5125x -40 c to 85 c sot-23-5 note: t1: sot-23-5 1 : bonding code u: tape & reel pin configuration typical application circuit g963 in en sot-23-5 5 4 1 lx 2 3 gnd fb in lx en fb gnd G5125 c out 10 f 10 h or 22 h 500k r1 v in =2.7v to 5.5v v out =15v G5125 44k r2 c in 4.7 f g963 in en sot-23-5 5 4 1 lx 2 3 gnd fb in lx en fb gnd G5125 c out 10 f 10 h or 22 h 500k r1 v in =2.7v to 5.5v v out =15v G5125 44k r2 c in 4.7 f
|
