LM5000

SNVS176D – MAY 2004 – REVISED MARCH 2007

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Connection Diagram

Figure 2. Top View

PIN DESCRIPTIONS

Pin

Name

Function

1

COMP

Compensation network connection. Connected to the output of the voltage error amplifier. The RC

compenstion network should be connected from this pin to AGND. An additional 100pF high frequency

capacitor to AGND is recommended.

2

FB

Output voltage feedback input.

3

SHDN

Shutdown control input, Open = enable, Ground = disable.

4

AGND

Analog ground, connect directly to PGND.

5

PGND

Power ground.

6

PGND

Power ground.

7

PGND

Power ground.

8

PGND

Power ground.

9

SW

Power switch input. Switch connected between SW pins and PGND pins

10

SW

Power switch input. Switch connected between SW pins and PGND pins

11

SW

Power switch input. Switch connected between SW pins and PGND pins

12

BYP

Bypass-Decouple Capacitor Connection, 0.1µF ceramic capacitor recommended.

13

VIN

Analog power input. A small RC filter is recommended, to suppress line glitches. Typical values of 10

Ω

and

≥ 0.1µF are recommended.

14

SS

Softstart Input. External capacitor and internal current source sets the softstart time.

15

FS

Switching frequency select input. Open = Fhigh. Ground = Flow

16

TEST

Factory test pin, connect to ground.

-

Exposed Pad

Connect to system ground plane for reduced thermal resistance.

underside of WSON

package

2

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