ver: 0.2 mar 13, 2012 tel: 886-3-5788833 http://www.gmt.com.tw 1 G543 global mixed-mode technology power distribution switch features ? 70m high-side mosfet ? internal current limit to 3.3a (typ) ? operating range:2.7v to 5.5v ? 1ms typical rise time ? fast overcurrent response:3s (typical) ? under voltage lockout ? 100 a quiescent supply current ? 1 a 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 ) ? msop-8 package applications ? high-side power protection switch ? usb power management ? hot plug-in power supplies ? battery-charger circuits general description the G543 is an integrated power switch for self-powered. the G543 has a typical r ds(on) of 70mohm. 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. 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. ordering information order number marking enable current limit output mos r ds(on) output shutdown resistor temp. range package (green) G543a1p81u G543a1 active high 3.3a 70mhom no -40 c to +85 c msop-8 G543a2p81u G543a2 active low 3.3a 70mhom no -40 c to +85 c msop-8 note: p8: msop-8 1: bonding code u: tape & reel pin configuration typical application circuit 0.1 f 22 f load oc en(en) 1 f power supply 2.7v to 5.5v out in on off * * : 1 f of input capacitor is enough in most application cases. if the pcb trace of power rail to in is long, larger input capacitor is necessary. G543 8 6 5 1 2 3 4 gnd msop-8 G543 7 out en (en) out oc in in nc 0.1 f 22 f load oc en(en) 1 f power supply 2.7v to 5.5v out in on off * * : 1 f of input capacitor is enough in most application cases. if the pcb trace of power rail to in is long, larger input capacitor is necessary. G543 8 6 5 1 2 3 4 gnd msop-8 G543 7 out en (en) out oc in in nc
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