12

1

2

3

4

5

6

7

11

10

9

8

13

SW

PGND

VIN

EN

PG

FB

AGND

VCC

BOOT

SW

VIN

DAP

PGND

4

LM60440, LM60430

SNVSBN5A – FEBRUARY 2020 – REVISED JUNE 2020

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Product Folder Links: LM60440 LM60430

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Copyright © 2020, Texas Instruments Incorporated

6 Pin Configuration and Functions

RPK Package

WQFN-13 With PowerPAD™

Top View

Pin Functions

PIN

TYPE

DESCRIPTION

NO.

NAME

1, 11

PGND

G

Power ground terminal. Connect to system ground and AGND. Connect to a bypass capacitor with short wide

traces.

2, 10

VIN

P

Input supply to regulator. Connect a high-quality bypass capacitor or capacitors directly to this pin and PGND.

3, 12

SW

P

Regulator switch node. Connect to power inductor. Pin 3 can be used to simplify the connection from the

4

BOOT

P

Bootstrap supply voltage for internal high-side driver. Connect a high-quality 100-nF capacitor from this pin to

the SW pin. On the WQFN package, connect the SW pin to NC on the PCB. This simplifies the connection from

5

VCC

P

Internal 5-V LDO output. Used as supply to internal control circuits. Do not connect to external loads. Can be

used as logic supply for power-good flag. Connect a high quality 1-µF capacitor from this pin to GND.

6

AGND

G

Analog ground for regulator and system. Ground reference for internal references and logic. All electrical

parameters are measured with respect to this pin. Connect to system ground on PCB.

7

FB

A

Feedback input to regulator. Connect to tap point of feedback voltage divider. Do not float. Do not ground.

8

PG

A

Open-drain power-good flag output. Connect to suitable voltage supply through a current limiting resistor. High

= power OK, low = power bad. Flag pulls low when EN = Low. Can be left open when not used.

9

EN

A

Enable input to regulator. High = ON, low = OFF. Can be connected directly to VIN; Do not float.

13

DAP

—

Low impedance connection to PGND. Connect to system ground on PCB. Major heat dissipation path for the

die. Must be used for heat sinking by soldering to ground copper on PCB. Thermal vias are preferred.

A = Analog, P = Power, G = Ground