MP3221

2.7A, 1.2MHz, High-Efficiency

Step-Up Converter

With Input Disconnect

MP3221 Rev. 1.0

www.MonolithicPower.com

1

9/23/2013

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

© 2013 MPS. All Rights Reserved.

DESCRIPTION

The MP3221 is a 1.2MHz frequency, 6-pin

TSOT23

current

mode

step

up

converter

intended for small, low power applications. The

device can step up three-cell alkaline, NiCd,

and NiMH batteries, or a single-cell Li-on

battery up to 6V. It is capable of delivering 1A

output current at 5V with a supply voltage of 3V.

The MP3221 provides the internal soft start and

compensation

to

minimize

the

external

component

count

and

help

producing

a

compact solution. It integrates a FAULT driver

for external PMOS to disconnect the output

from input when the part shuts down or in

output short circuit condition. This disconnect

feature allows the output to be completely

discharged, thus allowing the part to draw less

than 1µA off current in shutdown mode.

The MP3221 is available in a small 6-pin

TSOT23 package.

FEATURES

 Integrated 88mΩ Power MOSFET

 270µA Quiescent Current

 2.5V to 6V Input Voltage

 3V to 6V Output Voltage

 1.2MHz Fixed Switching Frequency

 Internal 2.7A Switch Current Limit

 Integrated Input Disconnect Driver

 Internal Soft Start and Compensation

 True Output Disconnect from Input

 Under Voltage Lockout

 Short-Circuit Protection

 Over-Temperature Protection

 Available in a 6-Pin TSOT23-6 Package

APPLICATIONS

 Single-Cell Lion Battery or Three-Cell

Alkaline, NiCd, or NiMH Battery Based

Products

 Portable Media Players

 Wireless Peripherals

 Tablets and Smart Phones

All MPS parts are lead-free and adhere to the RoHS directive. For MPS green

status, please visit MPS website under Products, Quality Assurance page.

“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of

Monolithic Power Systems, Inc.

TYPICAL APPLICATION