MP2224

High-Efficiency, 4A, 18V, 500kHz

Synchronous Step-Down Converter

MP2224 Rev. 1.0

www.MonolithicPower.com

1

12/18/2015

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

© 2015 MPS. All Rights Reserved.

DESCRIPTION

The MP2224 is a high-efficiency, synchronous,

rectified,

step-down,

switch-mode

converter

with built-in power MOSFETs. It offers a very

compact solution to achieve a 4A output current

with excellent load and line regulation over a

wide input supply range. The MP2224 has

synchronous

mode

operation

for

higher

efficiency over the output current load range.

Current-mode operation provides fast transient

response and eases loop stabilization.

Full protection features include over-current

protection and thermal shutdown.

The MP2224 requires a minimal number of

readily

available,

standard,

external

components and is available in a space-saving

8-pin TSOT23 package.

FEATURES

 Wide 4.5V to 18V Operating Input Range

 Adjustable Output Voltage as low as 0.6V

 Low 70mΩ/25mΩ R

MOSFETs

 High Efficiency up to 97%

 Fixed 500kHz Switching Frequency

 Synchronizes from a 200kHz to 2MHz

External Clock

 2.4ms Internal Soft-Start Time

 1% Reference Accuracy at Room

Temperature

 Internal Power-Save Mode

 OCP with Hiccup Mode

 Available in 8-pin TSOT23

APPLICATIONS

 Flat-Panel Television and Monitors

 Notebook Systems and I/O Power

 Digital Set-Top Boxes

 Distributed Power Systems

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

MPS green status, please visit the MPS website under Quality Assurance.

“MPS” and “The Future of Analog IC Technology” are registered trademarks of

Monolithic Power S ystems, Inc.

TYPICAL APPLICATION

MP2224

3.3V/4A

EN/SYNC

AGND

VCC

IN

FB

SW

BST

C1

22

μF

L1

3.3

μH

R1

40.2K

R2

8.87K

C5

0.1

μF

C4

0.1

μF

EN/SYNC

GND

VOUT

VIN

C2

22

μF×2