OUT

IN

GND

OUT

FAULT

SHDN

CC

SET*

1

3

4

2

6

5

7

8

DAP

SHDN

1

2

3

4

5

6

7

8

OUT

IN

GND

OUT

CC

SET *

FAULT

LP3982

www.ti.com

SNVS185E – FEBRUARY 2002 – REVISED OCTOBER 2015

5 Pin Configuration and Functions

DGK Package

8-Pin VSSOP

Top View

The SET pin is internally disconnected for the fixed versions.

NGM Package

8-Pin WSON With Thermal Pad

Top View

The SET pin is internally disconnected for the fixed versions.

Pin Functions

PIN

I/O

DESCRIPTION

NAME

NO.

Connect a capacitor between CC pin and ground to reduce the output noise. The optimum

CC

6

—

value for CC is 33 nF.

FAULT pin goes low during out of regulation conditions like current limit and thermal

FAULT

8

Output

shutdown, or when it approaches dropout. Requires a pullup resistor because it is an active-

low, open-drain output.

GND

3

Ground

Ground

IN

2

Input

This is the input supply voltage to the regulator.

OUT

1, 4

Output

Regulated output voltage

In the adjustable version a resistor divider connected to this pin sets the output voltage. The

SET

5

Input

SET pin is internally disconnected for the fixed versions.

The SHDN pin allows the part to be turned to an ON or OFF state by pulling SHDN pin high

SHDN

7

Input

or low.

WSON Only - The DAP (Die Attached Pad) is an exposed pad that does not have an internal

DAP

√

—

connection; it functions as a thermal relief when soldered to a copper plane. It is recommend

that the DAP be connected to GND. See WSON Mounting section for more information.

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