G5125 Global Mixed-mode Technology Inc. Micro-Power Boost DC/DC Converter Features General Description The G5125 boost converter contains a 0.7Ω internal switch. The IC operates at constant frequency 1MHz, allowing the use of tiny, low cost and low height inductors 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 circuit. 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. Operating Voltage：2.7V ~ 5.5V High Operating Frequency：1MHz Shutdown Current：＜1μA 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 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 10µH or 22µH G5125 LX 1 GND 2 5 CIN 4.7µF IN 4 3 GND SOT-23-5 500k R1 FB EN EN COUT 10µF LX IN G5125 G963 FB VOUT=15V VIN=2.7V to 5.5V 44k R2 TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.2 Jul 08, 2010 1