TPS25940 datasheet(16/50 Pages) TI1

16 / 50 page

TPS25940-Q1

SLVSDJ0C – MAY 2016 – REVISED JULY 2018

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Product Folder Links: TPS25940-Q1

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8 Detailed Description

8.1 Overview

The TPS25940x-Q1 device is a smart eFuse with integrated back-to-back FETs and enhanced built-in protection

circuitry. It provides robust protection for all systems and applications powered from 2.7 V to 18 V.

For hot-plug-in boards, the device provides hot-swap power management with in-rush current control and

programmable output ramp-rate. The device integrates overcurrent and short circuit protection. The precision

overcurrent limit helps to minimize over design of the input power supply, while the fast response short circuit

protection immediately isolates the load from input when a short circuit is detected. The device allows the user to

program the overcurrent limit threshold between 0.6 A and 5.3 A via an external resistor.

The device provides precise monitoring of voltage bus for brown-out and overvoltage conditions and asserts fault

for downstream system. Its overall threshold accuracy of 2% ensures tight supervision of bus, eliminating the

need for a separate supply voltage supervisor chip.

The device is designed to protect systems such as USB hubs against sudden output short to battery events. The

device monitors V(IN) and V(OUT) to provide true reverse blocking from output when output short to battery fault

condition or input power fail condition is detected.

The additional features include:

•

Precise current monitor output for health monitoring of the system

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Additional power good comparator with precision internal reference for output or any other rail voltage

monitoring

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Over temperature protection to safely shutdown in the event of an overcurrent event

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De-glitched fault reporting for brown-out and overvoltage faults

•

A choice of latched or automatic restart mode

TPS25940 Datasheet(PDF) 16 Page - Texas Instruments