1 Features

1• Input Voltage: 1.1 V to 3.6 V

• Ultralow ON-State Resistance

– rON = 66 mΩ at VIN = 3.6 V

– rON = 75 mΩ at VIN = 2.5 V

– rON = 90 mΩ at VIN = 1.8 V

– rON = 135 mΩ at VIN = 1.2 V

• 500-mA Maximum Continuous Switch Current

• Quiescent Current < 1 μA

• Shutdown Current < 1 μA

• Low Control Input Threshold Enables Use of 1.2-

V, 1.8-V, 2.5-V, and 3.3-V Logic

• Controlled Slew Rate (5 μs Maximum at 3.6 V)

• Quick Output Discharge (TPS22904 Only)

• ESD Performance Tested Per JESD 22

– 2000-V Human Body Model

(A114-B, Class II)

– 1000-V Charged-Device Model (C101)

• 4-Terminal Wafer Chip-Scale Package (WCSP)

– 0.8 mm × 0.8 mm, free0.4-

mm Pitch, 0.5-mm Height

2 Applications

• PDAs

• Cell Phones

• GPS Devices

• MP3 Players

• Digital Cameras

• Peripheral Ports

• Portable Instrumentation

3 Description

The TPS22903 and TPS22904 are ultra-small, low rON single channel load switches with controlled

turnon. The device contains a P-channel MOSFET

that can operate over an input voltage range of 1.1 V

to 3.6 V. The switch is controlled by an on and off

input (ON), which is capable of interfacing directly with low-voltage control signals. In TPS22904, a 85-Ω

on-chip load resistor is added for output quick

discharge when switch is turned off.

TPS22903 and TPS22904 are available in a space-

saving 4-terminal WCSP 0.4-mm pitch (YFP). The

devices are characterized for operation over the free0.4-

air temperature range of –40°C to 85°C.