ON1

ON2

ON3

Y

VOUT

GND

Turn-On Slew Rate

Controlled Driver

Output Discharge

ESD Protection

VIN

Control

Logic

Configurable

Logic

C1

C2

B2

A2

B1

A1

TPS22932B

SLVS802C – AUGUST 2009 – REVISED MAY 2015

www.ti.com

9 Detailed Description

9.1 Overview

TPS22932B is a single-channel, low rON load switch with controlled turnon. The device contains a low rON P-

channel MOSFET that can operate over an input voltage range of 1.1 V to 3.6 V. The switch is controlled by

eight patterns of 3-bit input. The user can choose the logic functions MUX, AND, OR, NAND, NOR, inverter, and

noninverter. All inputs can be connected to VIN or GND. The control pins can be connected to low-voltage

GPIOs allowing it to be controlled by either 1.2-V, 1.8-V, 2.5-V, or 3.3-V logic signals while keeping extremely

low quiescent current. A 120-

Ω on-chip load resistor is available for output quick discharge when the switch is

turned off. The rise time (slew rate) of the device is internally controlled to avoid inrush current.

9.2 Functional Block Diagram

9.3 Feature Description

9.3.1 Configurable Logic Function

The switch is controlled by eight patterns of 3-bit input. The user can choose the logic functions MUX, AND, OR,

NAND, NOR, inverter, and noninverter. All inputs can be connected to VIN or GND. The control pins can be

connected to low-voltage GPIOs allowing it to be controlled by either 1.2-V, 1.8-V, 2.5-V, or 3.3-V logic signals

while keeping extremely low quiescent current.

9.3.2 Quick Output Discharge

The TPS22932B includes the Quick Output Discharge (QOD) feature. When the switch is disabled, a discharge

resistance with a typical value of 120

Ω is connected between the output and ground. This resistance pulls down

the output and prevents it from floating when the device is disabled.

14

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