Control

Logic

VIN

ON

VOUT

GND

Charge Pump

QOD

CT

13

TPS22918

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SLVSD76B – FEBRUARY 2016 – REVISED JUNE 2016

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8 Detailed Description

8.1 Overview

The TPS22918 is a 5.5-V, 2-A load switch in a 6-pin SOT-23 package. To reduce voltage drop for low voltage

and high current rails, the device implements a low resistance N-channel MOSFET which reduces the drop out

voltage across the device.

The device has a configurable slew rate which helps reduce or eliminate power supply droop because of large

inrush currents. Furthermore, the device features a QOD pin, which allows the configuration of the discharge rate

of VOUT once the switch is disabled. During shutdown, the device has very low leakage currents, thereby

reducing unnecessary leakages for downstream modules during standby. Integrated control logic, driver, charge

pump, and output discharge FET eliminates the need for any external components which reduces solution size

and bill of materials (BOM) count.

8.2 Functional Block Diagram