G5131

Global Mixed-mode Technology Inc. G5130/G5131 PSM Step-up DC/DC Converter Features „ „ „ „ „ „ „ „ w w w . D a t a „ General Description The G5130/G5131 boost converter is designed for use of main power source on portable equipments. It consist of an oscillator, PSM control logic circuit, an embedded power MOS (LX switch), accurate voltage reference, error amplifier, feedback resistors, and LX protection circuit. Only 3 external components (includes 1 inductor, 1 diode and 1 capacitor) are needed to construct the power application. For larger output power application, G5131 can be used to drive an external NPN device for more input current. 1~4 Cell Alkaline Battery Operating Range Output Voltage Range: 2.5V~5.0V in 0.1V Increments Minimum External Component (L, D, C) 100KHz Max. Oscillation Frequency 75% Duty Ratio Up to 80% Efficiency ±2% High Output Voltage Accuracy < 100ppm/°C Temperature Coefficient S h e e t 4 U . c o m SOT-89 and SOT-23-5 Small Packages Applications „ „ Power Source for Portable Equipments Handheld Computers, Palmtops „ Digital Still Cameras, Camcorders „ Cellular Phones, Pagers „ Portable Multimedia Players Pin Configuration Typical Application Circuit 1N5819 G5130 27µH~120µH VOUT LX VIN Battery 1 2 3 VOUT GND + - 22µF~100µF Top View 2.5V~5.0V Step 0.1V SOT-89 27µH~120µH 5 4 VIN 1N5819 G963 Battery G5131 VOUT EXT VOUT GND + - 22µF~100µF 2.5V~5.0V Step 0.1V 1 2 3 SOT-23-5 Ver: 0.3 Preliminary Jun 15, 2005 TEL: 886-3-5788833 http...