IN

OUT

FAULT

ILIM

GND

EN

USB Data

USB

Port

120 µF

20

NŸ

USB requirement only*

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

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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. ADVANCE INFORMATION for pre-production products; subject to

change without notice.

TPS25221

SLVSDT3 – JANUARY 2018

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

1

1 Features

1

•

•

Pin-to-Pin with TI Switch Portfolio

•

•

•

•

2-µs Short Circuit Response

•

8-ms Fault Reporting Deglitch

•

Reverse Current Blocking (when disabled)

•

Built-In Soft Start

•

UL 60950 and UL 62368 Recognition Pending

•

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

external capacitance)

2 Applications

•

USB Ports/Hubs, Laptops, Desktops

•

High-Definition Digital TVs

•

Set Top Boxes

•

Optical Socket Protection

3 Description

The TPS25221 is intended for applications such as

USB where heavy capacitive loads and short circuits

may be encountered. The programmable current-limit

threshold maybe set between 277 mA and 2.7 A

(typical) using an external resistor. Current-limit

accuracy as tight as ±10% can be achieved at the

higher current-limit settings. The power-switch rise

and fall times are controlled to minimize current

surges during turn on and turn off.

The

TPS25221

limits

output

current

to

the

programmed level when the output load attempts to

exceeds the current-limit threshold. The FAULT

output asserts low during overcurrent conditions.

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