Datasheet

LM2623
SNVS188G –MAY 2004–REVISED DECEMBER 2005 www.ti.com
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 V
DD
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.
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