MP2303A

3A, 28V, 360kHz Synchronous Rectified

Step-Down Converter

MP2303A Rev.1.1

www.MonolithicPower.com

1

7/25/2012

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

© 2012 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP2303A is a monolithic synchronous

buck regulator. The device integrates a 150mΩ

high-side MOSFET and a 80mΩ low-side

MOSFET that provide 3A continuous load

current over a wide operating input voltage of

4.7V to 28V. Current mode control provides fast

transient response and cycle-by-cycle current

limit.

An adjustable soft-start prevents inrush current

at turn-on. In shutdown mode, the supply

current drops to lower than 1μA.

This device, available in an 8-pin SOIC and

PDIP-8 packages, provides a very compact

system solution with minimal reliance on

external components.

FEATURES

 3A Output Current

 Wide 4.7V to 28V Operating Input Range

 Integrated MOSFET Switches

 Output Adjustable from 0.80V to 25V

 Up to 95% Efficiency

 Programmable Soft-Start

 Stable with Low ESR Ceramic Output Capacitors

 Fixed 360kHz Frequency

 Cycle-by-Cycle Over Current Protection

 Input Under Voltage Lockout

 Available in thermally enhanced 8-Pin SOIC

and PDIP-8 packages

APPLICATIONS

 Distributed Power Systems

 Pre-Regulator for Linear Regulators

 Notebook Computers

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

C5

10nF

MP2303A

BS

IN

1

2

3

5

6

4

8

7

FB

SW

SS

GND

COMP

EN

40

50

60

70

80

90

100

OUTPUT CURRENT

0

0.5 1.0 1.5 2.0 2.5

3.5

3.0