Preliminary Datasheet

LP6343

LP6343 –00 Version 1.0 Datasheet

Feb.-2010

www.lowpowersemi.com

Page 2 of 12

Functional Pin Description

SW

PGOOD

AGND

2

7

PGND

4

VIN

DFN10

SW

10

3

6

PGND

10

5

EN

VIN

1

7

VIN

EP

6

SW

5

PGND

8

9

FB

PGND

PGOOD

AGND

EP

1

9

4

MSOP10

SW

VIN

3

EN

8

2

FB

Pi n Desc ript io n

Pin NO

PIN

DESCRIPTION

1

EN

Enable Control Input. Drive EN1 above 1.5V to turn on the Channel. Drive EN below 0.4V to turn it off

(shutdown current < 0.1µA).

2, 3

Vin

Supply Input.

4

PGOOD

Power Good Open Drain Output. Connects a 100kΩ pull up resistor between VIN and this pin to obtain a

PGOOD voltage. Connect this pin to AGND if not used.

5

FB

Feedback Input. Connect FB to the center point of the external resistor divider.

Normal voltage for this pin is 0.6V.

7, 8

SW

Switch Mode Connection to Inductor. This pin connects to the drains of the

internal main and synchronous power MOSFET switches.

6,9,10

11

EP

Exposed PAD - must connect to Ground

Function Block Diagram