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TM

MP2359

1.2A, 24V, 1.4MHz

Step-Down Converter in a TSOT23-6

The Future of Analog IC Technology

TM

DESCRIPTION

The MP2359 is a monolithic step-down switch

mode converter with a built-in power MOSFET.

It achieves 1.2A peak 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.

The MP2359 requires a minimum number of

readily available standard external components.

The MP2359 is available in TSOT23-6 and

SOT23-6 packages.

FEATURES

鈥?/div>

1.2A Peak Output Current

0.35鈩?Internal Power MOSFET Switch

Stable with Low ESR Output Ceramic

Capacitors

Up to 92% Efficiency

0.1碌A Shutdown Mode

Fixed 1.4MHz Frequency

Thermal Shutdown

Cycle-by-Cycle Over Current Protection

Wide 4.5V to 24V Operating Input Range

Output Adjustable from 0.81V to 15V

Available in TSOT23-6 and SOT23-6

Packages

Distributed Power Systems

Battery Charger

Pre-Regulator for Linear Regulators

WLED Drivers

EVALUATION BOARD REFERENCE

Board Number

EV2359DJ-00B

Dimensions

2.1鈥漍 x 1.9鈥漎 x 0.4鈥漐

APPLICATIONS

鈥?/div>

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

Power Systems, Inc.

TYPICAL APPLICATION

Efficiency vs

Load Currents

12V

V

IN

5

IN

BST

1

100

CB

10nF

90

80

V

IN

= 12V

MP2359

OFF ON

4

EN

SW

EFFICIENCY (%)

6

D1

B230A

FB

3

V

OUT

3.3V @ 1.2A

70

60

50

40

30

20

10

0

0.01

V

IN

= 24V

GND

2

V

OUT

= 5V

0.1

1

LOAD CURRENT (A)

10

MP2359 Rev. 1.1

6/23/2006

www.MonolithicPower.com

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

1

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