1 Features
• Integrated single channel load switch
• Input voltage range: 1V to 5.5V
• Maximum continuous switch current: 2.7A
• Typical ON-resistance: 28mΩ
• Low quiescent current:
– IQ at 3.3V VIN = 6μA (typical)
• Ultra-low shutdown current:
– ISD at 3.3V VIN = 200nA (maximum)
• 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): 150Ω
• Thermal shutdown protection
• UQFN package: 0.85 × 0.75mm, 0.4mm pitch

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

3 Description
The TPS22991I is a small, low RON, single channel
load switch with controlled slew rate. The device
contains an N-channel MOSFET that operates over
an input voltage range of 1.0V to 5.5V and supports
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.
For space constrained, battery powered applications,
the device is suitable due to its small size and low
RON. The wide input voltage range of the switch
applies to 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
TPS22991I further reduces the total solution size by
integrating a 150Ω pulldown resistor for quick output
discharge (QOD) when the switch is turned off.
The TPS22991I 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.