MP2131 – 4 A, 5.5 V, 1.2 MHZ SYNCHRONOUS STEP-DOWN CONVERTER

MP2131 Rev.1.0

www.MonolithicPower.com

9

5/6/2015

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

© 2015 MPS. All Rights Reserved.

PIN FUNCTIONS

Pin #

Name

Description

1

PVIN

Supply voltage to power FETs. PVIN is connected to VIN internally.

2, 11

SW

Switch output. Pin 2 and pin 11 can be connected together.

3, 12

PGND

Power ground. Pin 3 and pin 12 can be connected together.

4

AGND

Quiet ground for controller circuits.

5

NC

No connection. Leave NC open.

6

OUT

Input sense pin for output voltage.

7

FB

Feedback. An external resistor divider from the output to GND (tapped to FB) sets

the output voltage.

8

EN

On/off control.

9

PG

Power good indicator. The output of PG is an open drain with an internal pull-up

resistor to VIN. PG is pulled up to VIN when the FB voltage is within 10% of the

regulation level; otherwise it is low.

10

VIN

Supply voltage to internal control circuitry. VIN is connected to PVIN internally.