ver 2.6 nov 06, 2013 tel: 886-3-5788833 http://www.gmt.com.tw 1 G546 global mixed-mode technology dual power distribution switch features ? 87m r ds(on) (G546x1, G546x2) and 72m r ds(on) (G546x3, G546x4) ? available with 5 versions of current limits with foldback ? operating range:2.7v to 5.5v ? 400 s typical rise time ? under voltage lockout ? 65 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 ) ? sop-8 package,msop-8 , msop-8 (fd) and tdfn3x3-8 package ? ul approved_#e232223 ? nemko iec 60950-1 cb/cca_scheme certifi- cation report #67291 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 G546 are integrated dual channel 87m (G546x1, G546x2) and 72m (G546x3, G546x4) power switchs 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. pin configuration typical application circuit r ul recognized component r ul recognized component note: recommend connecting the thermal pad to the ground for excellent power dissipation. 22 f load oc1 en1 (en1) oc2 en2 (en2) 22 f load 22 f power supply 2.7v to 5.5v out1 out2 in sop-8/msop-8 G546 8 6 5 oc1 7 out1 out2 oc2 G546 tdfn3x3-8 1 2 3 4 8 7 6 5 thermal pad oc1 out1 out2 oc2 gnd en1(en1) in en2 (en2) 1 2 3 4 gnd en1(en1) in en2 (en2) * : 22 fx2ea of input capacitor is to prevent input voltage drop at output short. if the pcb trace of power rail to in is long, larger input capacitor is necessary. * G546 8 6 5 1 2 3 4 msop-8 (fd) G546 7 thermal pad gnd en1(en1) in en2 (en2) oc1 out1 out2 oc2 22 f * note: recommend connecting the thermal pad to the ground for excellent power dissipation. 22 f load oc1 en1 (en1) oc2 en2 (en2) 22 f load 22 f power supply 2.7v to 5.5v out1 out2 in sop-8/msop-8 G546 8 6 5 oc1 7 out1 out2 oc2 G546 tdfn3x3-8 1 2 3 4 8 7 6 5 thermal pad oc1 out1 out2 oc2 gnd en1(en1) in en2 (en2) 1 2 3 4 gnd en1(en1) in en2 (en2) * : 22 fx2ea of input capacitor is to prevent input voltage drop at output short. if the pcb trace of power rail to in is long, larger input capacitor is necessary. * G546 8 6 5 1 2 3 4 msop-8 (fd) G546 7 thermal pad gnd en1(en1) in en2 (en2) oc1 out1 out2 oc2 22 f *
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