G5254 Global Mixed-mode Technology Current Limited Load Switch Features General Description The G5254 is a current limited N-channel MOSFET power switch designed for highside load switching applications. The low RDS(ON) N-channel power Input Voltage Range: 2.7V to 5.5V Programmable Over-Current Threshold 90mΩ Typical RDS(ON) at VIN=5V Only 2.5V Needed for ON/OFF Control Under-Voltage Lockout Thermal Shutdown No Reverse Leakage Current 5-Pin SOT-23 Package 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 systems. 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 temperatures. Current limit threshold is programmed with a resistor from SET to ground. In shutdown mode, the supply current decreases to less than 1µA. The reverse leakage current is also less than 1µA. Applications Hot Swap Supplies Notebook Computers Peripheral Ports Personal Communication Devices The G5254 is available in a SOT-23-5 package Ordering Information ORDER NUMBER MARKING TEMP. RANGE ENABLE 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 G5254 G5254 OUT 1 GND 2 5 IN INPUT ON (ON) 1µF IN OUT ON/(ON) GND SET OUTPUT 0.47µF RSET SET GND 4 ON (ON) 3 GND SOT-23-5 TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.4 Jul 26, 2012 1