1 Features
• Integrated single channel load switch
• Input voltage range: 1V to 5.5V
• 3A maximum continuous switch current
• 25mΩ typical ON-resistance
• Low quiescent current:
– IQ at 3.3V VIN = 6μA (typ)
• Low shutdown current:
– ISD at 3.3V VIN = 14nA (typ)
• Controlled slew rate:
– Version B, BN: rise time (tR) at 3.3V VIN =
141μs
– Version C, CN: rise time (tR) at 3.3V VIN =
662μs
• Quick output discharge (QOD) of 150Ω
• Thermal shutdown protection
• 0.85 × 0.75mm, 0.4mm pitch UQFN package

2 Applications
• PC and notebooks
• Wearables
• Solid state drive (SSD)
• Industrial PC

3 Description
The TPS22991 is a small, low RON, single channel
load switch with controlled slew rate. The device
contains an N-channel MOSFET that can operate
over an input voltage range of 1.0V to 5.5V and can
support a maximum continuous current of 3A. The
switch is controlled by an on and off input, which is
capable of interfacing directly with low-voltage control
signals.
The small size and low RON makes the device ideal
for being used in space constrained, battery powered
applications. The wide input voltage range of the
switch makes it a versatile solution for many different
voltage rails. The controlled rise time of the device
greatly reduces inrush current caused by large bulk
load capacitances, thereby reducing or eliminating
power supply droop. The TPS22991 further reduces
the total solution size by integrating a 150Ω pulldown
resistor for quick output discharge (QOD) when the
switch is turned off.
The TPS22991 is available in a small, space saving
0.85mm × 0.75mm, 0.4mm pitch, 4-pin UQFN
package. The device is characterized for operation
over the free-air temperature range of –55°C to
+125°C.