ver 0.4 oct 05, 2011 tel: 886-3-5788833 http://www.gmt.com.tw 1 G5244 global mixed-mode technology high-side power distribution switch features 120m w ww w high-side mosfet 2.5a of current limits with foldback operating range:2.7v to 5.5v 1.9ms typical v out turn-on rise time under voltage lockout 65 a quiescent supply current 1 a maximum standby supply current active-high enable pin no reverse current when power off shutdown discharge function at dsg pin sot-23-5 and adfn1.5x1.5-6 package available 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 general description the G5244 is an 120m w power switch for self-powered and bus-powered universal serial bus (usb) applications. several protection features such as current limitin g with foldback, and thermal shutdown are included to prevent catastrophic switch failure caused by increa s- ing power dissipation when continuous heavy loads or short circuit occurs. a built-in charge pump is use d to drive the n-channel mosfet that makes it free of parasitic body diode to eliminate any reversed curr ent flow across the switch when it is powered off. the G5244 has a shutdown discharge function when power switch is turned off. user could realize the shu t- down discharge function by adding an external resist or between out pin and dsg pin. its low quiescent supply current and small package sot-23-5 and adfn1.5x1.5-6 is particularly suitable in battery-powered equipment, like pda, mobile phone. ordering information order number marking temp. range package (green) G5244t11u 5244x -40 c to +85 c sot-23-5 G5244a31u 54 xx -40 c to +85 c adfn1.5x1.5-6 note: t1: sot-23-5 a3: adfn1.5x1.5-6 1: bonding code u: tape & reel pin configuration typical appl ication circuit G5244 v out v in c out 4.7 f c in 1 f in en gnd out on off dsg out sot-23-5 5 4 1 en 2 3 gnd in G5244 dsg shutdown discharge resistor adfn1.5x1.5-6 1 2 3 6 5 4 G5244 in nc dsg en gnd out G5244 v out v in c out 4.7 f c in 1 f in en gnd out on off dsg out sot-23-5 5 4 1 en 2 3 gnd in G5244 dsg shutdown discharge resistor adfn1.5x1.5-6 1 2 3 6 5 4 G5244 in nc dsg en gnd out
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