G553 Global Mixed-mode Technology Inc. Power Distribution Switch Features General Description The G553 is an integrated 125mΩ power switch for self-powered and bus-powered Universal Serial Bus (USB) applications. 125mΩ High-Side MOSFET 450mA Typical Current Limit with Foldback Operating Range:2.7V to 5.5V 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. Output ( OC ) Output Shutdown Pull-low Resister Turn-on Soft Start 1.5ms Typical Rise Time SOP-8 Packages 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 (Green) G553D1P11U G553D2P11U G553D1 G553D2 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 G553 G553 GND 1 8 OUT IN 2 7 OUT IN 3 6 OUT EN (EN) 4 5 OC Power Supply 2.7V to 5.5V IN 1µF* OUT Load 0.1µF 22µF OC ON EN(EN) OFF *: 1µF of input capacitor is enough in most application cases. SOP-8 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: 1.5 Nov 12, 2009 1