1

2

3

4

5

6

7

8

BOOT

VIN

EN

SS

PH

GND

COMP

VSENSE

PowerPAD

(Pin 9)

TM

TPS54531

SLVSBI5 – MAY 2013

www.ti.com

ELECTRICAL CHARACTERISTICS (continued)

DESCRIPTION

TEST CONDITIONS

MIN

TYP

MAX

UNIT

THERMAL SHUTDOWN

Thermal Shutdown

165

°C

SLOW START (SS PIN)

Charge current

2

μA

DEVICE INFORMATION

PIN ASSIGNMENTS

DDA PACKAGE

(TOP VIEW)

PIN FUNCTIONS

PIN

DESCRIPTION

NAME

NO.

BOOT

1

A 0.1

μF bootstrap capacitor is required between BOOT and PH. If the voltage on this capacitor falls

below the minimum requirement, the high-side MOSFET is forced to switch off until the capacitor is

refreshed.

VIN

2

Input supply voltage, 3.5 V to 28 V.

EN

3

Enable pin. Pull below 1.25V to disable. Float to enable. Programming the input undervoltage lockout with

two resistors is recommended.

SS

4

Slow start pin. An external capacitor connected to this pin sets the output rise time.

VSENSE

5

Inverting node of the gm error amplifier.

COMP

6

Error amplifier output, and input to the PWM comparator. Connect frequency compensation components

to this pin.

GND

7

Ground.

PH

8

The source of the internal high-side power MOSFET.

PowerPAD™

9

GND pin must be connected to the exposed pad for proper operation. This pin is only available in the

DDA package.

4

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