MP3221

–2.7A, 1.2MHZ, HIGH-EFFICIENCY STEP UP CONVERTER WITH INPUT DISCONNECT

MP3221 Rev. 1.0

www.MonolithicPower.com

8

9/23/2013

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

© 2013 MPS. All Rights Reserved.

PIN FUNCTIONS

Pin #

Name

Description

1

SW

Power Switch Output. SW is the drain of the internal MOSFET switch. Connect the power

inductor and output rectifier to SW.

2

GND

Ground.

3

FB

Feedback Input. The FB voltage is 0.796V. Connect a resistor divider to FB.

4

EN

Regulator On/Off Control Input. A high input at EN turns on the converter, and a low input

turns it off. When not used, connect EN to the input supply for automatic startup.

5

IN

Input Supply Pin. Must be locally bypassed.

6

FAULT

(6)

Fault Disconnection Switch Gate Output. When the system starts up normally, this pin

smoothly turns on the external PMOS. When the MP3221 is disabled or in fault condition,

the external PMOS is turned off to disconnect the input and output.

Notes:

6) Fault pin only can protect circuits in SCP condition after parts startup.