G5255 Global Mixed-mode Technology Inc. Current Limited Load Switch Features General Description The G5255 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 Open-drain Fault Flag Pin TDFN2X2-6, MSOP-8 and SOP-8 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 G5255 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. An open-drain flag output is also available to indicate fault condition, including overcurrent, and thermal shutdown. 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 G5255 is available in TDFN2X2-6, MSOP-8 and SOP-8 packages. Ordering Information ORDER NUMBER MARKING TEMP. RANGE ENABLE PACKAGE (Green) G5255LRB1U E55A Active Low -40°C to +85°C TDFN2X2-6 G5255HRB1U G5255LP12U G5255HP12U G5255LP81U G5255HP81U E55B G5255LA G5255HA G5255L G5255H Active High Active Low Active High Active High Active High -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C TDFN2X2-6 SOP-8 SOP-8 MSOP-8 MSOP-8 Note: RB: TDFN2X2-6 P1: SOP-8 1 & 2: Bonding Code U : Tape & Reel P8: MSOP-8 Pin Configuration Typical Application Circuit G5255 G5255 IN 1 8 OUT IN 1 8 OUT IN 2 7 OUT IN 2 7 OUT GND 3 6 SET GND 3 6 FLG 5 FLG ON(ON) 4 5 SET ON(ON) 4 10k MSOP-8 SOP-8 INPUT IN G5255 SET 1 IN 2 OUT 3 Thermal Pad 6 ON(ON) 5 GND FLG signal FLG ON (ON) 1µF G5255 OUT SET ON(ON) GND 0.47µF RSET 4 FLG GND GND TDFN2X2-6 Note: Recommend connecting the Thermal Pad to the GND for excellent power dissipation. TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.8 Dec 02, 2010 1