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TM

MP2361

2A, 23V, 1.4MHz

Step-Down Converter

The Future of Analog IC Technology

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 20碌A 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.

FEATURES

鈥?/div>

2A Output Current with QFN Package

0.18鈩?Internal Power MOSFET Switch

Stable with Low ESR Output Ceramic

Capacitors

90% Efficiency

20碌A 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

Distributed Power Systems

Battery Charger

DSL Modems

Pre-Regulator for Linear Regulators

EVALUATION BOARD REFERENCE

Board Number

EV2361DQ-00A

Dimensions

2.3鈥漍 x 1.5鈥漎 x 0.5鈥漐

APPLICATIONS

鈥淢PS鈥?and 鈥淭he Future of Analog IC Technology鈥?are Trademarks of Monolithic

Power Systems, Inc.

TYPICAL APPLICATION

INPUT

4.75V to 23V

4

9

10

IN

EN

2

BS

SW

C5

10nF

5

7

Efficiency vs

Load Current

100

90

EFFICIENCY (%)

V

OUT

=5V

MP2361

SS

GND

6

FB

COMP

8

D1

B220A

V

OUT

2.5V/2A

80

V

OUT

=2.5V

70

60

50

V

OUT

=3.3V

C4

10nF

C6

OPEN

C3

1.8nF

0

MP2361_TAC_S01

0.5

1.0

1.5

LOAD CURRENT (A)

2.0

MP2361-EC01

MP2361 Rev. 1.2

1/11/2006

www.MonolithicPower.com

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

1

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