MP2492

2A, 55V, 100kHz Step-Down Converter

with Programmable Output Current Limit

MP2492 Rev. 1.0

www.MonolithicPower.com

1

12/20/2010

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2010 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP2492 is a monolithic step-down switch

mode converter with a programmable output

current limit. It achieves 2A continuous output

current over a wide input supply range with

excellent load and line regulation.

The

maximum

output

current

can

be

programmed by sensing current through the

inductor DC resistance (DCR) or an accurate

sense resistor.

MP2492 achieves low EMI signature with well

controlled switching edges.

Fault condition protection includes cycle-by-cycle

current limiting, and thermal shutdown.

The MP2492 requires a minimum number of

readily available standard external components.

The MP2492 is available in QFN10 (3mm x 3mm)

and SOIC8E packages.

FEATURES

• Wide 4.5V to 55V Operating Input Range

• Programmable up to 2A Output Current

• Output Adjustable from 0.8V to 15V

• Programmable Output Current Limit without

power loss

• 0.25Ω Internal Power MOSFET Switch

• Stable with Low ESR Output Ceramic

Capacitors

• Fixed 100kHz Frequency

• Low EMI signature

• Thermal Shutdown

• Cycle-by-Cycle Over Current Protection

• Available in QFN10 and SOIC8E Packages

APPLICATIONS

•

USB Power Supplies

•

Automotive Cigarette Lighter Adapters

•

Power Supply for Linear Chargers

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

Monolithic Power Systems, Inc.

TYPICAL APPLICATION

Efficiency

20

30

40

50

60

70

80

90

100

0.0

0.4

0.8

1.2

1.6

2.0