LM2623

SNVS188G – MAY 2004 – REVISED DECEMBER 2005

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Connection Diagram

Figure 1. WSON Package

Top View

Figure 2. VSSOP-8 (DGK) Package

Top View

Pin Description

WSON-14 Pin

VSSOP-8 Pin

Name

Function

1

NC

No Connect

2, 3

1

PGND

Power Ground (WSON Pins 2 & 3 must be shorted together).

4

2

EN

Active-Low Shutdown Input

5

3

FREQ

Frequency Adjust. An external resistor connected between this pin

and a voltage source sets the switching frequency of the LM2623.

6

4

FB

Output Voltage Feedback

7

NC

No Connect

8

NC

No connect

9

5

SGND

Signal Ground

10

6

Power Supply for Internal Circuitry

11

7

BOOT

Bootstrap Supply for the Gate Drive of Internal MOSFET Power

Switch

12, 13

8

SW

Drain of the Internal MOSFET Power Switch. (WSON Pins 12 & 13

must be shorted together).

14

NC

No Connect

DAP

DAP

To be soldered to board for enhanced thermal dissipation. To be

electrically isolated/floating.

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam

during storage or handling to prevent electrostatic damage to the MOS gates.

2

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