G546 Global Mixed-mode Technology Dual Power Distribution Switch Features General Description The G546 are integrated dual channel 87mΩ (G546X1, G546X2) and 72mΩ (G546X3, G546X4) power switchs for self-powered and bus-powered Universal Serial Bus (USB) applications. 87mΩ RDS(ON) (G546X1, G546X2) and 72mΩ RDS(ON) (G546X3, G546X4) Available with 5 Versions of Current Limits with Foldback Operating Range:2.7V to 5.5V 400µS Typical Rise Time Under voltage Lockout 65µA 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 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. And 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. OC is open-drain output report over-current or over-temperature event and has typical 9ms deglitch timeout period. Output ( OC ) SOP-8 Package,MSOP-8 , MSOP-8 (FD) and TDFN3X3-8 Package UL Approved_#E232223 Nemko IEC 60950-1 CB/CCA_scheme Certification Report #67291 Applications High-Side Power Protection Switch USB Power Management USB Host and Self-Powered Bubs USB Bus-Powered Hubs Hot Plug-In Power Supplies Battery-Charger Circuits Pin Configuration Typical Application Circuit G546 GND 1 8 OC1 IN 2 7 OUT1 EN1(EN1) 3 6 OUT2 EN2 (EN2) 4 5 OC2 G546 Power Supply 2.7V to 5.5V IN 22µF* OUT1 22µF* Load 22µF OC1 SOP-8/MSOP-8 EN1 (EN1) G546 GND IN 8 1 7 2 EN1(EN1) 3 EN2 (EN2) 4 Thermal Pad MSOP-8 (FD) OC2 G546 OC1 OUT1 OUT2 EN2 (EN2) GND 1 IN 2 6 OUT2 EN1(EN1) 3 5 OC2 EN2 (EN2) 4 Thermal Pad 8 OC1 7 OUT1 6 OUT2 5 OC2 Load 22µF *: 22µFx2ea of input capacitor is to prevent input voltage drop at output short. If the PCB trace of power rail to IN is long, larger input capacitor is necessary. TDFN3X3-8 Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation. R UL Recognized Component TEL: 886-3-5788833 http://www.gmt.com.tw Ver 2.6 Nov 06, 2013 1