MP3412

1.1A, 1MHz Synchronous Boost

WLED Driver with Output Disconnect

MP3412 Rev. 0.9

www.MonolithicPower.com

1

1/19/2010

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© 2010 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP3412 is a synchronous, fixed frequency,

high efficiency step-up WLED driver with true

6-lead Thin-SOT23 package.

The MP3412 can startup from an input voltage as

low as 0.8V and provides in-rush current limiting

as well as output short circuit protection. The

open load protection is also integrated

A switching frequency of 1MHz minimizes overall

solution footprint by allowing the use of tiny, low

profile inductors and ceramic capacitors. Current

mode PWM control with internal compensation

reduces external parts, thereby saving critical

board space.

The device also features low shutdown current of

under 1µA. The true output disconnect feature

allows the output to be completely discharged in

shutdown. It also limits the inrush of current

during start-up, minimizing surge current seen by

the input supply.

The MP3412 is available in 6-pin thin SOT23

package.

FEATURES

• Input Range: 0.8V to 4.4V

• Output Range: 2.5V to 5.0V

• 0.8V Low Start-Up Voltage

• Internal Power MOSFET and Synchronous

Rectifier

• 1MHz Fixed Switching Frequency

• Current Mode Control with Internal

Compensation

• Up to 96% Efficiency

• <1µA Shutdown Current

• Tiny External Components

• True Output Load Disconnect

• Inrush Current Limiting and Internal Soft-

Start

• Open-Load Protection

• Short-Circuit Protection

• Available in TSOT23-6 Package

APPLICATION

• General LED Illuminations

• Cellular Phones

• Digital Cameras

• Handheld Instruments

• Wireless Handsets

• GPS Receivers

“Monolithic Power Systems”, “MPS”, and “The Future of Analog IC

Technology” are Registered Trademarks of Monolithic Power Systems, Inc.

TYPICAL APPLICATION

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23

45

Efficiency

LDO Mode

Boost Mode