G543 Global Mixed-mode Technology Power Distribution Switch Features General Description The G543 is an integrated power switch for self-powered. The G543 has a typical RDS(ON) of 70mohm. 70mΩ High-Side MOSFET Internal Current Limit to 3.3A (TYP) Operating Range:2.7V to 5.5V 1mS Typical Rise Time Fast Overcurrent Response:3µS (TYPICAL) Under voltage Lockout 100µA Quiescent Supply Current 1µA Maximum Shutdown Supply Current Logic Level Enable Pin, Available with Active-High or Active-Low Version No Reverse Current when Power Off Deglitched Open-Drain Over-Current Flag Output ( OC ) MSOP-8 Package OC is open-drain output report over-current or over-temperature event and has typical 9ms deglitch timeout period. Several Protection features include current limiting with foldback, and thermal shutdown to prevent catastrophic switch failure caused by increasing power dissipation when continuous heavy loads or short circuit occurs. A built-in charge pump is used to drive the N-channel MOSFET that is free of parasitic body diode to eliminate any reversed current flow across the switch when it is powered off. Applications High-Side Power Protection Switch USB Power Management Hot Plug-In Power Supplies Battery-Charger Circuits Ordering Information ORDER NUMBER MARKING ENABLE Current Limit Output MOS RDS(ON) Output Shutdown Resistor TEMP. RANGE PACKAGE (Green) G543A1P81U G543A1 Active High 3.3A 70mhom No -40°C to +85°C MSOP-8 G543A2P81U G543A2 Active Low 3.3A 70mhom No -40°C to +85°C MSOP-8 Note: P8: MSOP-8 1: Bonding Code U: Tape & Reel Pin Configuration Typical Application Circuit G543 Power Supply 2.7V to 5.5V G543 GND 1 8 OUT IN 2 7 OUT IN 1µF* 3 6 NC EN (EN) 4 5 OC MSOP-8 Load 0.1µF 22µF OC ON IN OUT EN(EN) OFF *: 1µF of input capacitor is enough in most application cases. If the PCB trace of power rail to IN is long, larger input capacitor is necessary. TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.2 Mar 13, 2012 1