GND

IN

IN

EN

FAULT

OUT

OUT

ILIM

1

2

3

4

5

6

7

8

EN = Active-low for the TPS2556-Q1

EN = Active-high for the TPS2557-Q1

Thermal

Pad

TPS2556-Q1, TPS2557-Q1

www.ti.com

SLVSC97A – MARCH 2014 – REVISED MARCH 2014

Device Comparison Table

MAX. OPERATING

DEVICE

OUTPUTS

ENABLES

CURRENT (A)

TPS2556-Q1

5

1

Active-low

22

TPS2557-Q1

5

1

Active-high

22

TPS2561A-Q1

2.5

2

Active-high

44

5 Terminal Configuration and Functions

8-Terminal S-PVSON With Thermal Pad

DRB Package

(Top View)

Terminal Functions

TERMINAL

I/O

DESCRIPTION

NAME

TPS2556-Q1

TPS2557-Q1

EN

4

–

I

Enable input, logic low turns on power switch

EN

–

4

I

Enable input, logic high turns on power switch

GND

1

1

–

Ground connection; connect externally to PowerPAD

IN

2, 3

2, 3

I

Input voltage; connect a 0.1

μF or greater ceramic capacitor from

IN to GND as close to the IC as possible.

FAULT

8

8

O

Active-low open-drain output, asserted during overcurrent or

overtemperature conditions.

OUT

6, 7

6, 7

O

Power-switch output

ILIM

5

5

O

External resistor used to set current-limit threshold; recommended

20 k

Internally connected to GND; used to heat-sink the part to the

Thermal pad

–

–

–

circuit board traces. Connect therma pad to GND terminal

externally.

6 Specifications

6.1 Absolute Maximum Ratings

over operating free-air temperature range unless otherwise noted

(1) (2)

MIN

UNIT

Voltage range on IN, OUT, EN or EN, ILIM, FAULT

–0.3

7

V

Voltage range from IN to OUT

–7

7

V

I

Continuous output current

Internally limited

Continuous FAULT sink current

25

mA

ILIM source current

Internally limited

mA

Maximum junction temperature

–40

Internally limited

°C

(1)

Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings

only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended

Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

(2)

Voltages are referenced to GND unless otherwise noted.

Copyright © 2014, Texas Instruments Incorporated

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Product Folder Links: TPS2556-Q1 TPS2557-Q1