MP2361

2A, 23V, 1.4MHz

Step-Down Converter

MP2361 Rev. 1.2

www.MonolithicPower.com

1

1/11/2006

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2006 MPS. All Rights Reserved.

The Future of Analog IC Technology

TM

TM

DESCRIPTION

The MP2361 is a monolithic step-down switch

mode converter with a built-in internal power

MOSFET. It achieves 2A 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 protections include cycle-by-cycle

current limiting and thermal shutdown. In

shutdown mode the regulator draws 20µA of

supply

current.

Programmable

soft-start

minimizes the inrush supply current and the

output overshoot at initial startup.

The MP2361 requires a minimum number of

readily available standard external components.

EVALUATION BOARD REFERENCE

Board Number

Dimensions

EV2361DQ-00A

2.3”X x 1.5”Y x 0.5”Z

FEATURES

• 2A Output Current with QFN Package

• 0.18Ω Internal Power MOSFET Switch

• Stable with Low ESR Output Ceramic

Capacitors

• 90% Efficiency

• 20µA Shutdown Mode

• Fixed 1.4MHz Frequency

• Thermal Shutdown

• Cycle-by-Cycle Over Current Protection

• Wide 4.75V to 23V Operating Input Range

• Output Adjustable from 0.92V to 16V

• Programmable Under Voltage Lockout

• Available in 10-pin QFN (3mm x 3mm) and

Tiny MSOP Packages

• Evaluation Board Available

APPLICATIONS

• Distributed Power Systems

• Battery Charger

• DSL Modems

• Pre-Regulator for Linear Regulators

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

Power Systems, Inc.

TYPICAL APPLICATION

MP2361

SW

IN

BS

42

FB

5

7

SS

COMP

GND

8

6

EN

10

9

2.5V/2A

INPUT

4.75V to 23V

MP2361_TAC_S01

C5

10nF

C3

1.8nF

C4

10nF

D1

B220A

C6

OPEN

100

90

80

70

60

50

0

2.0

0.5

1.0

1.5

LOAD CURRENT (A)

MP2361-EC01

Efficiency vs

Load Current