1 Features

• 2.5-V to 5.5-V VOPERATING

• Pin-to-Pin with TPS2553

• 2-A ICONT_MAX

• 0.275-A to 2.7-A Adjustable ILIMIT (±6.5% at 1.7 A)

• 70-mΩ (typical) RON

• 1.5-μs Short Circuit Response

• 8-ms Fault Reporting Deglitch

• Reverse Current Blocking (when disabled)

• Built-In Soft Start

• UL 60950 and UL 62368 Recognition

• 15-kV ESD Protection per IEC 61000-4-2 (with

external capacitance)

2 Applications

• USB Ports/Hubs, Laptops, Desktops

• HDTV

• Set Top Boxes

• Optical Socket Protection

3 Description

The TPS25221 is intended for applications where

heavy capacitive loads and short circuits may be

encountered. The programmable current-limit

threshold maybe set between 275 mA and 2.7 A

(typical) using an external resistor. ILIMIT accuracy as

tight as ±6% can be achieved at the higher currentlimit

settings. Power-switch rise and fall times are

controlled to minimize current surges during turn on

and turn off.

When a load attempts to draw current exceeding the

programmed ILIMIT the internal FET enters constant

current mode in order to keep ILOAD at or below ILIMIT.

The FAULT output will assert low during over-current

conditions after the built in de-glitch time.