MP2359

1.2A, 24V, 1.4MHz

Step-Down Converter in a TSOT23-6

MP2359 Rev. 1.1

www.MonolithicPower.com

1

6/23/2006

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© 2006 MPS. All Rights Reserved.

The Future of Analog IC Technology

TM

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.

EVALUATION BOARD REFERENCE

Board Number

Dimensions

EV2359DJ-00B

2.1”X x 1.9”Y x 0.4”Z

FEATURES

• 1.2A Peak Output Current

• 0.35Ω Internal Power MOSFET Switch

• Stable with Low ESR Output Ceramic

Capacitors

• Up to 92% Efficiency

• 0.1µA 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

APPLICATIONS

•

Distributed Power Systems

•

Battery Charger

•

Pre-Regulator for Linear Regulators

•

WLED Drivers

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

Power Systems, Inc.

TYPICAL APPLICATION

MP2359

SW

FB

BST

GND

IN

EN

1

6

3

2

4

5

3.3V @ 1.2A

CB

10nF

D1

B230A

12V

OFF ON

Efficiency vs

Load Currents

100

90

80

70

60

50

40

30

20

10

0

LOAD CURRENT (A)

0.01

0.1

1

10