PAD

1

2

3

4

GND

5

IN

9

6

OUT

7

8

ILIM0

10

FAULT

TPS2554/TPS2555

DRC PACKAGE

(TOP VIEW)

ILIM_SEL

IN

OUT

ILIM1

EN/EN

8/9

4

7

6

2/3

10

5

1

IN

FAULT

EN/EN

OUT

ILIM_SEL

ILIM0

Power

PAD

GND

ILIM1

TPS2554/55

100 nF

4.5 V to 5.5 V

FAULT Signal

Power Switch

Enable

Current Limit

Select

120 mF

VBUS

TPS2554

TPS2555

www.ti.com

SLVSAM0

– JUNE 2011

Precision Adjustable Current-Limited, Power-Distribution Switches

Check for Samples: TPS2554, TPS2555

1

FEATURES

APPLICATIONS

2

•

Meets USB Current-Limiting Requirements

•

USB Ports/Hubs

•

Adjustable Current Limit, 500 mA to 2.5 A (typ)

•

Digital TV

•

Two Independently-Settable, Current-Limit

•

Set-Top Boxes

Thresholds

•

VOIP Phones

•

Fast Overcurrent Response - 1.5

μs (typ)

DESCRIPTION

•

73-m

Ω High-Side MOSFET

The TPS2554/55 power-distribution switches are

•

3.8-

μA Maximum Standby Supply Current

intended for applications where precision current

•

PowerPAD

™ Thermal Management

limiting is required or heavy capacitive loads and

•

Automatic Output Discharge when Disabled

short circuits are encountered. These devices offer a

•

Both High-Enable (TPS2554) and Low-Enable

programmable current-limit threshold between 500

(TPS2555) Versions Available

mA and 2.5 A (typ) via an external resistor.

TPS2554/55 devices limit the output current to a safe

level by switching into a constant-current mode when

the output load exceeds the current-limit threshold.

The

FAULT

logic

output

asserts

low

during

overcurrent and over-temperature conditions.

TPS2554/55 DRC Package and Typical Application Diagram

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

PowerPAD is a trademark of Texas Instruments.

PRODUCTION DATA information is current as of publication date.

Copyright

© 2011, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.