DM1

USB

Connector

VBUS

D–

D+

GND

5 V OUT

C

OUT

DC to DC

Converter

or Controller

(LM25117-Q1,

TPS54340-Q1,

TPS54240-Q1,

TPS40170-Q1)

TPS2513A-Q1

TPS2556-Q1

DP1

DM2

DP2

VIN

GND

R

ILIM

0.1 F

IN

IN

EN

FAULT

OUT

OUT

ILIM

GND

Thermal Pad

Control Signal

100 kΩ

TPS2557-Q1

Recommend TPS2561A-Q1

for the Dual Port Solution

C

USB

Product

Folder

Sample &

Buy

Technical

Documents

Tools &

Software

Support &

Community

TPS2556-Q1, TPS2557-Q1

SLVSC97A – MARCH 2014 – REVISED MARCH 2014

TPS255x-Q1 Precision Automotive Adjustable Current-Limited Power-Distribution

Switches

1 Features

3 Description

The

TPS2556-Q1

and

TPS2557-Q1

power-

1

•

AEC-Q100 Qualified

distribution switches are specialized for automotive

–

Device HBM ESD Classification Level H2

applications which require precision current limiting or

–

Device CDM ESD Classification Level C5

capacity to handle heavy capacitive loads and short

circuits. These devices offer a programmable current-

•

Meets USB Current-Limiting Requirements

limit threshold between 500 mA and 5 A (typical) via

•

Adjustable Current Limit, 500 mA–5 A (Typ.)

an external resistor. Control of the power-switch rise

•

±6.5% Current-Limit Accuracy at 4.5 A

and fall times minimizes current surges during turnon

or turnoff.

•

Fast Short-Circuit Response – 3.5-

μs (Typ.)

•

22-m

Ω High-Side MOSFET

TPS2556-Q1 and TPS2557-Q1 devices limit the

output current to a safe level by switching into a

•

Operating Range: 2.5 V to 6.5 V

constant-current mode when the output load exceeds

•

2-

μA Maximum Standby Supply Current

the current-limit threshold. The FAULT logic output

•

Built-In Soft-Start

asserts low during overcurrent and overtemperature

•

15-kV and 8-kV System-Level ESD Capable

conditions.

Use with the TPS2511-Q1 or TPS2513A-Q1 for a

2 Application

low-loss,

automotive-qualified,

USB

charging-port

Automotive USB Charging Ports

solution capable of charging all of today's popular

phones and tablets.

Device Information

ORDER NUMBER

PACKAGE

BODY SIZE

TPS2556QDRB

S-PVSON (8)

3 mm × 3 mm

TPS2557QDRB

S-PVSON (8)

3 mm × 3 mm

space

space

space

space

Typical Application as Power Switch of

Single-Port Automotive USB Charge Port

1

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.