MP28252

High Efficiency 2A, 21V, 500kHz

Synchronous Step-down Converter

MP28252 Rev. 1.1

www.MonolithicPower.com

1

12/25/2013

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

© 2013 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP28252 is a high frequency synchronous

rectified step-down switch mode converter with

built in internal power MOSFETs. It offers a

very compact solution to achieve 2A continuous

output current over a wide input supply range

with excellent load and line regulation. The

MP28252 has synchronous mode operation for

higher efficiency over output current load range.

Current mode operation provides fast transient

response and eases loop stabilization.

Full protection features include OCP and

thermal shut down.

The MP28252 requires a minimum number of

readily available standard external components

and is available in a space saving 3mm x 4mm

14-pin QFN package.

FEATURES

• Wide 4.5V to 21V Operating Input Range

• 2A Output Current

• Low Rds(on) Internal Power MOSFETs

• Proprietary

Switching

Loss

Reduction

Technique

• High Efficiency Synchronous Mode Operation

• Fixed 500kHz Switching Frequency

• Sync from 300kHz to 2MHz External Clock

• Internal Compensation

• Integrated Bootstrap Diode

• OCP Protection and Thermal Shutdown

• Output Adjustable from 0.805V

• Available in a 3mm x 4mm 14-Pin QFN

Package

•

APPLICATIONS

•

Notebook Systems and I/O Power

•

Networking Systems

•

Digital Set Top Boxes

•

Personal Video Recorders

•

Flat Panel Television and Monitors

•

Distributed Power Systems

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

MP28252

SW

GND

FB

EN/SYNC

EN

IN

BST

VCC

R2

10K

Rt

25K

R1

5K

R3

100K

VIN

VOUT

1.2V@2A

8

11, 12, 13, 14

6

2, 3

4, 5

1

10

7

PG

PG

9

Efficiency vs. Output Current

0

10

20

30

40

50

60

70

80

90

100

00.5

11.5

2

OUTPUT CURRENT (A)

V

V

V