Pin

Name

Function

13

NC

Not internally connected. Leave pin open.

14

SS

Boost converter soft start pin.

15

V

C

Boost compensation network connection. Connected to the output of the voltage error

amplifier.

16

FREQ

Switching frequency select input. Connect this pin to V

AGND for 660kHz operation.

17

V

IN

Boost converter and GPM power input.

18

SW

Boost power switch input. Switch connected between SW pin and PGND pin.

19

SHDN

Shutdown pin. Active low, pulling this pin low disable the LM3310.

20

FB

Boost output voltage feedback input.

21

PGND

Power Ground. Source connection of the step-up regulator NMOS switch and ground for

the GPM circuit. Connect AGND and PGND directly to the DAP beneath the device.

22

CE

Connect capacitor from this pin to AGND.

23

RE

Connect a resistor between RE and PGND.

24

VGH

GPM power supply input. VGH range is 5V to 30V.

DAP

Die Attach Pad. Internally connected to GND. Connect AGND and PGND pins directly to

this pad beneath the device.

Block Diagrams

20133357

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