MP2459

0.5A, 55V, 480kHz

Step-Down Converter in a TSOT23-6

MP2459 Rev. 1.0

www.MonolithicPower.com

1

3/4/2013

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

© 2013 MPS. All Rights Reserved.

The

Future

of

Analog

IC

T

echnology

DESCRIPTION

The MP2459 is a monolithic, step-down, switch-

mode converter with a built-in power MOSFET.

It achieves a 0.5A peak-output current over a

wide input supply range with excellent load and

line

regulation.

Current-mode

operation

provides a fast transient response and eases

loop stabilization. Fault condition protections

include cycle-by-cycle current limiting and thermal

shutdown.

The MP2459 requires a minimal number of

readily-available

external

components.

The

MP2459 is available in a TSOT23-6 package.

FEATURES

•

0.5A Peak Output Current

•

1

Internal Power MOSFET

•

Stable with Low-ESR Ceramic Output

Capacitors

•

Up to 90% Efficiency

•

0.1µA Shutdown Mode

•

Fixed 480kHz Frequency

•

Thermal Shutdown

•

Cycle-by-Cycle Over-Current Protection

•

Wide 4.5V-to-55V Operating Input Range

•

•

Available in a TSOT23-6 Package

APPLICATIONS

•

Power Meters

•

Distributed Power Systems

•

Battery Chargers

•

Pre-Regulator for Linear Regulators

•

WLED Drivers

All MPS parts are lead-free and adhere to the RoHS directive. For MPS green

status, please visit MPS website under Products, Quality Assurance page.

“MPS” and “The Future of Analog IC Technology” are registered trademarks of

Monolithic Power Systems, Inc.

TYPICAL APPLICATION

VIN

GND

GND

VOU T

EN

EN

U1

L1

D1

MP2459

IN

BS T

SW

FB

30

40

50

60

70

80

90

100

0.0

0.1

0.2

0.3

0.4

0.5

0.6