MP28313

2A, 16V, 340KHz Synchronous Rectified

Step-Down Converter

MP28313 Rev. 1.5

www.MonolithicPower.com

1

9/27/2010

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2010 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP28313 is a monolithic synchronous buck

regulator.

The

device

integrates

130mΩ

MOSFETS that provide 2A continuous load

current over a wide operating input voltage of

5V to 16V. Current mode control provides fast

transient response and cycle-by-cycle current

limit.

An adjustable soft-start prevents inrush current

at turn-on. Shutdown mode drops the supply

current to 1µA.

This device, available in an 8-pin SOIC

package, provides a very compact system

solution with minimal reliance on external

components.

FEATURES

• 2A Output Current

• Wide 5V to 16V Operating Input Range

• Integrated 130mΩ Power MOSFET Switches

• Output Adjustable from 0.923V to 13V

• Up to 93% Efficiency

• Programmable Soft-Start

• Stable with Low ESR Ceramic Output Capacitors

• Fixed 340KHz Frequency

• Cycle-by-Cycle Over Current Protection

• Input Under Voltage Lockout

APPLICATIONS

• Distributed Power Systems

• Networking Systems

• FPGA, DSP, ASIC Power Supplies

• Green Electronics/ Appliances

• Notebook Computers

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

Monolithic Power Systems, Inc.

TYPICAL APPLICATION

INPUT

5V to 16V

OUTPUT

3.3V

2A

C3

3.3nF

C5

10nF

MP28313

BS

IN

FB

SW

SS

GND

COMP

EN

1

2

3

5

6

4

8

7

100

95

90

85

80

75

70

65

60

55

50

0

1.0

2.0

2.5

1.5

0.5

LOAD CURRENT (A)

MP28313_EC01

Efficiency vs

Load Current