MP3430 — 90V STEP-UP CONVERTER WITH APD CURRENT MONITOR

MP3430 Rev 1.11

www.MonolithicPower.com

4

4/25/2013

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PIN FUNCTIONS

Pin #

Name

Description

1, 16

PGND

Power Ground. Pins connected internally. For best performance, connect both pins to

board ground.

2

Input Supply. Locally bypass this pin.

3

EN

Shutdown. Tie to 1.6V or higher to enable device; 0.6V or less to disable device.

4, 6, 11

NC

Not Connected.

5

FB

Feedback. Connect to the output-resistor–divider tap.

7

MON2

Current-Monitor Output. It sources a current equal to 50% of the APD current and

converts to a reference voltage through an external resistor.

8

AGND

Analog Ground.

9

RLIM

Current-Limit Resistor. Connect a resistor from RLIM to GND to program the APD

current-limit threshold.

10

MON1

Current-Monitor Output. It sources a current equal to 10% of the APD current and

converts to a reference voltage through an external resistor.

12

APD

Connect to APD Cathode.

13

MONIN

Current-Monitor Power Supply. Connect an external low-pass filter to further reduce

supply voltage ripple.

14, 15

SW

Switch. Minimize the trace length on this pin to reduce EMI.

Exposed

Pad

GND. Solder to a large copper plane on the PCB.