MP2377

3A, 21V, 600kHz

Step-Down Converter

MP2377 Rev. 0.92

www.MonolithicPower.com

1

4/19/2011

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© 2011 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP2377 is a monolithic step-down switch

mode converter with a built in high-side power

MOSFET. It achieves 3A continuous output

current over a wide input supply range with

excellent load and line regulation.

Current mode operation provides fast transient

response and eases loop stabilization.

Fault condition protection includes current limiting

and thermal shutdown.

The MP2377 requires a minimum number of

readily available standard external components

and is available in 8-pin SOIC packages with

exposed pad.

FEATURES

• Wide 4.5V to 21V Operating Input Range

• 3A Output Current

• 100mΩ Internal Power MOSFET Switch

• Power Good Indicator

• Fixed 600kHz Frequency

• Synchronizable to >1MHz External Clock

• Over Current Latch Off Protection

• Thermal Shutdown

• Output Adjustable from 0.81V

• Stable with Low ESR Output Ceramic

Capacitors

• Available in Thermally Enhanced 8-Pin

SOIC Packages

• Supports Soft-Start into Pre-Biased Output

APPLICATIONS

•

Distributed Power Systems

•

Battery Charger

•

Pre-Regulator for Linear Regulators

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

Monolithic Power Systems, Inc.

TYPICAL APPLICATION

FB

BST

1

5

4

2

GND

IN

EN/SYNC

OFF ON

PG

POWER

GOOD

VCC

8

7

6

3

100

80

60

40

20

0

0

0.5 1.0 1.5 2.0 2.5 3.0 3.5

LOAD CURRENT (A)

Efficiency vs

Load Current