MP2497

3A, 50V, 100kHz Step-Down Converter

with Programmable Output OVP Threshold

MP2497 Rev. 1.12

www.MonolithicPower.com

1

12/22/2011

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

© 2011 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP2497 is a monolithic step-down switch

mode converter with a programmable output

current limit. It achieves 3A continuous output

current over a wide input supply range with

excellent load and line regulation. An internal

2~4ms soft start prevents inrush current at turning

on. And it is capable of providing output line drop

compensation.

MP2497 achieves low EMI signature with well

controlled switching edges.

Fault condition protection includes hiccup current

limit and short circuit protection, programmable

output over voltage protection and thermal

shutdown.

The MP2497 requires a minimum number of

readily available standard external components.

The MP2497 is available in SOIC8 and SOIC8E

package.

FEATURES

• Wide 4.5V to 50V Operating Input Range

• Programmable

Output

Over

Voltage

Protection

• Output Adjustable from 0.8V to 25V

• 0.15Ω Internal Power MOSFET Switch

• Internal 4ms Soft Start

• Stable with Low ESR Output Ceramic

Capacitors

• Fixed 100kHz Frequency

• Low EMI Signature

• Thermal Shutdown

• Output Line Drop Compensation

• Hiccup Circuit Limit and Short Circuit

Protection

• Available in SOIC8 and SOIC8E Package

APPLICATIONS

• USB Power Supplies

• Automotive Cigarette Lighter Adapters

• Power Supply for Linear Chargers

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

+

33µH

MP2497

SW

OVP

ISP

ISN

FB

BST

VIN

GND

GND

0.1µF

GND

10kO

39kO

22µF

100µF

33mO

0.1µF

1kO

1kO

10nF

10nF

301kO

57.6kO

150pF

0O

0.1µF

0.1µF

220µF

2.2µF

Efficiency vs.

Output Current

55

60

65

70

75

80

85

90

95

OUTPUT CURRENT (A)

0.1 0.5 0.9 1.3 1.7 2.1 2.5 2.9