ver 1.3 sep 29, 2010 tel: 886-3-5788833 http://www.gmt.com.tw 1 G556 global mixed-mode technology inc. dual power distribution switch features ? 100m high-side mosfet ? available with 4 versions of current limits with foldback ? operating range:2.7v to 5.5v ? 400s typical rise time ? under voltage lockout ? 65a quiescent supply current ? 1a 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 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 G556 is an integrated dual channel 100m 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. 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 temp. range package (green) G556a1p1u G556a1 active high 2a -40 c to +85 c sop-8 G556a2p1u G556a2 active low 2a -40 c to +85 c sop-8 G556b1p1u G556b1 active high 1.5a -40 c to +85 c sop-8 G556b2p1u G556b2 active low 1.5a -40 c to +85 c sop-8 G556c1p1u G556c1 active high 1a -40 c to +85 c sop-8 G556c2p1u G556c2 active low 1a -40 c to +85 c sop-8 G556d1p1u G556d1 active high 0.75a -40 c to +85 c sop-8 G556d2p1u G556d2 active low 0.75a -40 c to +85 c sop-8 pin configuration typical application circuit 8 6 5 1 2 3 4 gnd oc1 en1(en1) sop-8 G556 7 out1 in out2 en2 (en2) 0.1 f 22 f load oc1 en1 (en1) oc2 en2 (en2) 0.1 f 22 f load 1 f power supply 2.7v to 5.5v out1 out2 oc2 in 7 2 1 3 4 5 8 8 6 5 1 2 3 4 gnd oc1 en1(en1) sop-8 G556 7 out1 in out2 en2 (en2) 0.1 f 22 f load oc1 en1 (en1) oc2 en2 (en2) 0.1 f 22 f load 1 f power supply 2.7v to 5.5v out1 out2 oc2 in 7 2 1 3 4 5 8
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