MP2303

3A, 28V, 340KHz Synchronous Rectified

Step-Down Converter

INITIAL RELEASE – SPECIFICATIONS SUBJECT TO CHANGE

MP2303 Rev. 0.92

www.MonolithicPower.com

1

5/2/2006

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2006 MPS. All Rights Reserved.

The Future of Analog IC Technology

TM

TM

DESCRIPTION

The MP2303 is a monolithic synchronous buck

regulator.

The

device

integrates

power

MOSFETS that provide 3A continuous load

current over a wide operating input voltage of

4.75V 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 1µA.

This device, available in 8-pin SOIC and 3x3

10-pin QFN packages, provides a very compact

system solution with minimal reliance on

external components.

EVALUATION BOARD REFERENCE

Board Number

Dimensions

EV2303DN-00A

2.0”X x 1.5”Y x 0.5”Z

FEATURES

• 3A Output Current

• Wide 4.75V to 28V Operating Input Range

• Integrated Power MOSFET Switches

• Output Adjustable from 0.8V to 25V

• Up to 95% Efficiency

• Programmable Soft-Start

• Stable with Low ESR Ceramic Output Capacitors

• Fixed 340KHz Frequency

• Cycle-by-Cycle Over Current Protection

• Input Under Voltage Lockout

• Thermally Enhanced 8-Pin SOIC and

3x3 QFN10 Packages

APPLICATIONS

• Distributed Power Systems

• Pre-Regulator for Linear Regulators

• Notebook Computers

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

Power Systems, Inc.

TYPICAL APPLICATION

VIN

4.75V-28V

VOUT

5V/3A

C5

10nF

C3

3.3nF

MP2303

BS

SS

EN

COMP

FB

IN

SW

GND

MP2303_TAC01

100

90

80

70

60

50

0

0.5

1.0

1.5

2.0

2.5

3.0

LOAD CURRENT (A)

MP2303-EC01

Efficiency vs

Load Current