ver 1.0 dec 22, 2008 tel: 886-3-5788833 http://www.gmt.com.tw 1 G5243A global mixed-mode technology inc. high-side power distribution switch features ? 120m high-side mosfet ? 2a 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 out pin ? sot-23-5 package ? 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 G5243A is an integrated 120m power switch for self-powered and bus-powered universal serial bus (usb) applications. several protection features include current limiting with foldback, and thermal shutdown to prevent catas- trophic switch failure caused by increasing power dis- sipation 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. G5243A has shutdown discharge function when power switch is off. the typi- cal pull low resistor is 75 . its low quiescent supply current and small package (sot-23-5) is particularly suitable in battery-powered equipment, like pda, mobile phone. ordering information order number marking shutdown pull low resistor temp. range package (green) G5243At11u 523ax 75 -40 c to +85 c sot-23-5 note: t1: sot-23-5 1: bonding code u: tape & reel pin configuration typical application circuit in out sot-23-5 5 4 1 en 2 3 gnd in G5243A v out v in c out 4.7 f c in 1 f in en gnd out on off G5243A in out sot-23-5 5 4 1 en 2 3 gnd in G5243A v out v in c out 4.7 f c in 1 f in en gnd out on off G5243A
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