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  ver: 0.4 jul 26, 2012 tel: 886-3-5788833 http://www.gmt.com.tw 1 G5254 global mixed-mode technology current limited load switch features ? input voltage range: 2.7v to 5.5v ? programmable over-current threshold ? 90m typical r ds(on) at v in =5v ? only 2.5v needed for on/off control ? under-voltage lockout ? thermal shutdown ? no reverse leakage current ? 5-pin sot-23 package applications ? hot swap supplies ? notebook computers ? peripheral ports ? personal communication devices general description the G5254 is a current limited n-channel mosfet power switch designed for highside load switching applications. the low r ds(on) n-channel power mosfet is driven by a built-in charge pump which generates a voltage higher than the supply voltage to fully enhance the switch. this switch operates with inputs ranging from 2.7v to 5.5v, making it ideal for both 3.3v and 5v sys- tems. an integrated current- limiting circuit protects the input supply against large current which may cause the supply to fall out of regulation. the G5254 is also protected from thermal overload which limits power dissipation and junction tem- peratures. current limit threshold is programmed with a resistor from set to ground. in shutdown mode, the supply current decreases to less than 1 a. the reverse leakage current is also less than 1 a. the G5254 is available in a sot-23-5 package ordering information order number marking enable temp. range package (green) G5254lt11u e254lx active low -40 c to +85 c sot-23-5 G5254ht11u e254hx active high -40 c to +85 c sot-23-5 note:t1: sot-23-5 1: bonding code u : tape & reel pin configuration typical application circuit output input 0.47 f 1 f in on/(on) gnd out G5254 out sot-23-5 5 4 1 set 2 3 gnd in G5254 on (on) on (on) r set set gnd gnd output input 0.47 f 1 f in on/(on) gnd out G5254 out sot-23-5 5 4 1 set 2 3 gnd in G5254 on (on) on (on) r set set gnd gnd


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