MP2499

Integrated 100V Load Dump Protection

2A, 100kHz Step Down Regulator with

Programmable Output Current

MP2499 Rev. 0.91

www.MonolithicPower.com

1

11/24/2010

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© 2010 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP2499 is a monolithic step-down switch

mode converter with a programmable output

current limit and an integrated input over-

voltage protection switch. It achieves 2.0A

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.

Fault condition protection includes cycle-by-cycle

current limiting and thermal shutdown.

The MP2499 can survive high-voltage transients

such as those found in automotive and industrial

applications.

The MP2499 requires a minimum number of

readily available standard external components.

The MP2499 is available in a 16-pin SOIC

package.

FEATURES

• Replaces External Transorb

• Supports 12V/24V Systems

• Input Surge Protection Up to 100V

• Programmable Output Current up to 2.0A

• Output Adjustable

• Fixed 100kHz Frequency

• 0.25Ω Internal Power MOSFET Switch

• Stable with Low ESR Output Ceramic

Capacitors

• 92% Efficiency @ 500mA (Vo=5V)

• Thermal Shutdown

• Cycle-by-Cycle Over Current Protection

• Available in a 16-Pin SOIC Package

APPLICATIONS

•

12V/24V Systems with High Input Surge

•

Automotive Cigarette Lighter Adapters

•

Power Supply for Linear Chargers

•

Industrial Power Supplies

•

Avionics

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

Monolithic Power Systems, Inc.

TYPICAL APPLICATION