G5135 Global Mixed-mode Technology Inc. Micro-Power Boost DC/DC Converter Features General Description The G5135 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 40V 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 G5135 includes cycle-by-cycle 850mA current limiting to maximum inductor current and over-temperature protection circuit. The G5135 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 G5135 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 40V Soft Start Function Cycle by Cycle Current Limiting SOT-23-5 Package Applications STN/OLED BIAS Personal Digital Assistants DSC TV Tunner Ordering Information ORDER NUMBER MARKING TEMP. RANGE PACKAGE (Pb free) G5135T11U 5135x -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 G5135 LX 1 GND 2 FB 3 V IN =4.5V to 5.5V 5 C IN 4.7µF IN V OUT=33V IN G5135 4 GND SOT-23-5 475k R1 FB EN EN C OUT 1µF MLCC LX 18.7k R2 TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.3 Aug 01, 2008 1