G554 Global Mixed-mode Technology Inc. Dual Power Distribution Switch Features General Description The G554 is an integrated dual channel 118mΩ power switch for self-powered and bus-powered Universal Serial Bus (USB) applications. 118mΩ High-Side MOSFET 450mA Typical Current Limit 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 Output ( OC ) SOP-8 Package 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. 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 Ordering Information ORDER NUMBER MARKING ENABLE Current Limit TEMP. RANGE PACKAGE (Pb free) G554D1P11U G554D2P11U G554D1 G554D2 Active High Active Low 0.45A 0.45A -40°C to +85°C -40°C to +85°C SOP-8 SOP-8 Note: P1: SOP-8 1: Bonding Code U: Tape & Reel Pin Configuration Typical Application Circuit G554 GND 1 8 OC1 IN 2 7 OUT1 EN1(EN1) 3 6 OUT2 EN2 (EN2) 4 5 OC2 Power Supply 2.7V to 5.5V IN OUT1 1µF Load 0.1µF 22µF OC1 EN1 (EN1) OC2 OUT2 Load EN2 (EN2) 0.1µF 22µF SOP-8 TEL: 886-3-5788833 http://www.gmt.com.tw Ver 0.2 Jan 11, 2008 1