1

2

3

4

5

6

7

14

13

12

11

10

9

8

NC

PGND

PGND

EN

FREQ

FB

NC

NC

NC

SW

SW

BOOT

SGND

3

LM2623-Q1

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5 Pin Configuration and Functions

NHL Package

14-Pin WSON

Top View

Pin Functions

PIN

TYPE

DESCRIPTION

NO.

NAME

1

NC

—

No connect

2, 3

PGND

GND

Power ground (pins 2 and 3 must be shorted together)

4

EN

Digital

Active-low shutdown input

5

FREQ

Analog

Frequency adjust; connect an external resistor between this pin and a voltage source

sets the switching frequency of the LM2623-Q1.

6

FB

Analog

Output voltage feedback

7

NC

—

No connect

8

NC

—

No connect

9

SGND

GND

Signal ground

10

Power

Power supply for internal circuitry

11

BOOT

Analog

Bootstrap supply for the gate drive of internal MOSFET power switch

12, 13

SW

Analog

Drain of the internal MOSFET power switch (pins 12 and 13 must be shorted together)

14

NC

—

No connect

DAP

DAP

Thermal

Solder to board for enhanced thermal dissipation; must be electrically isolated/floating.