Connection Diagram

30050420

NS Package Number SE08A

Order Information

Order Number

Package Marking (Note)

Supplied As

LM3218SE

XVS SA

250 units, Tape-and-Reel

LM3218SEX

XVS SA

3000 units, Tape-and-Reel

Note: The actual physical placement of the package marking will vary from part to part. The package marking “X” designates the date code. “V” is a NSC internal

code for die traceability. Both will vary in production. “S” designates device type as switcher and “SA” identifies the device (part number).

Pin Descriptions

Pin #

Name

Description

1

EN

Enable Input. Set this digital input high for normal operation. For shutdown, set low.

2

V

CON

Voltage Control Analog input. V

3

FB

Feedback Analog Input. Connect to the V

4

SGND

Analog and Control Ground.

5

V

OUT

Output Voltage, connects to one terminal of 2.6 µH inductor. Connect output filter capacitor C2 to get DC

voltage out.

6

PGND

Power Ground

7

PV

IN

Power Supply Voltage Input to the internal Buck PFET switch.

8

V

DD

Analog Supply Input.

www.national.com

2