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.