TPS22954DSQR datasheet(21/51 Pages) TI2

21 / 51 page

Control

Logic

OUT

GND

Driver

BIAS

SNS

VSNS

Power

supply

module

VEN

Thermal

Shutdown

Reverse Current

Blocking*

(TPS22953 Only)

(*) Only active when the switch is disabled.

QOD Resistance*

(TPS22954 Only)

TPS22954, TPS22953

www.ti.com

SLVSCT5D – MARCH 2015 – REVISED SEPTEMBER 2016

Product Folder Links: TPS22954 TPS22953

Submit Documentation Feedback

9 Detailed Description

9.1 Overview

The TPS22953/4 are 5.7-V, 5-A load switches in 10-pin SON packages. To reduce voltage drop for low voltage,

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

voltage through the device at high currents. The integrated adjustable undervoltage lockout (UVLO) and

adjustable power good (PG) threshold provides voltage monitoring as well as robust power sequencing.

The adjustable rise time control of the device greatly reduces inrush current for a wide variety of bulk load

capacitances, thereby reducing or eliminating power supply droop. The switch is independently controlled by an

on and off input (EN), which is capable of interfacing directly with low-voltage control signals. A 15-Ω on-chip

load resistor is integrated into the device for output quick discharge when switch is turned off.

During shutdown, the device has very low leakage currents, thereby reducing unneccessary leakages for

downstream modules during standby. Integrated power monitoring functionality, control logic, driver, power

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

and BOM count.

9.2 Functional Block Diagram

TPS22954DSQR Datasheet(PDF) 21 Page - Texas Instruments