MP2365

3A, 28V, 1.4MHz

Step-Down Converter

MP2365 Rev. 0.91

www.MonolithicPower.com

1

7/10/2006

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2006 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP2365 is a 1.4MHz step-down regulator

with a built-in 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 cycle-by-

cycle current limiting and thermal shutdown.

Adjustable soft-start reduces the stress on the

input source at turn-on. In shutdown mode the

regulator draws 20µA of supply current.

The MP2365 is available in an 8-pin SOIC

package with an exposed pad, and requires a

minimum number of readily available external

components to complete a 3A step-down DC to

DC converter solution.

EVALUATION BOARD REFERENCE

Board Number

Dimensions

EV2365DN-00A

2.0” x 1.9” x 0.4”

FEATURES

• 3A Continuous Output Current, 4A Peak

Output Current

• Programmable Soft-Start

• 100mΩ Internal Power MOSFET Switch

• Stable with Low ESR Output Ceramic

Capacitors

• Up to 90% Efficiency

• 20µA Shutdown Mode

• Fixed 1.4MHz Frequency

• Thermal Shutdown

• Cycle-by-Cycle Over Current Protection

• Wide 4.75V to 28V Operating Input Range

• Output is Adjustable From 0.92V to 21V

• Under Voltage Lockout

APPLICATIONS

• Distributed Power Systems

• Battery Chargers

• Pre-Regulator for Linear Regulators

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

Monolithic Power Systems, Inc.

TYPICAL APPLICATION

INPUT

4.75V to 28V

OUTPUT

3.3V

3A

MP2365

BS

IN

FB

SW

SS

GND

COMP

EN

1

3

5

6

4

8

7

2

OPEN

OPEN =

AUTOMATIC

STARTUP

5.6nF

10nF

B330A

Efficiency Curve

100

90

80

70

60

0

0.5

1.0

1.5

2.0

2.5

3.0

LOAD CURRENT (A)