IN

OUT

FAULT

ILIM

GND

EN

USB Data

USB

Port

120 µF

RILIM

20 NŸ

USB requirement only*

RFAULT

20 NŸ

0.1 µF

Input

5-V USB

*USB requirement that downstream facing ports are bypassed with at

least 120 µF per hub.

Control Signal

Signal

Fault

Thermal Pad

Product

Folder

Order

Now

Technical

Documents

Tools &

Software

Support &

Community

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

TPS25221

SLVSDT3D – JANUARY 2018 – REVISED DECEMBER 2019

TPS25221 2.5-V to 5.5-V, 2-A Continuous Current Limited Switch

1

1 Features

1

•

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 current-

limit 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.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

TPS25221

SOT-23 (6)

2.90 mm x 1.60 mm

WSON (6)

2.00 mm x 2.00 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

Simplified Schematic