MP3418

400mA, 1.2MHz, Synchronous, Step-up

Converter with Output Disconnect

MP3418 Rev 1.0

www.MonolithicPower.com

1

2/7/2013

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

© 2013 MPS. All Rights Reserved.

The

Future

of

Analog

IC

T

echnology

DESCRIPTION

The MP3418 is a high-efficiency, synchronous,

current–mode, step-up converter with output

disconnect.

The MP3418 can start up from an input voltage

as low as 0.8V to provide inrush current limiting,

and

output

short-circuit

protection.

The

integrated, P-channel, synchronous rectifier

improves efficiency and eliminates the need for

an

external

Schottky

diode.

The

PMOS

disconnects the output from the input when the

part shuts down. This output disconnect feature

allows the output to be completely discharged,

thus allowing the part to draw less than 1 A in

shutdown mode.

The 1.2MHz switching frequency allows for

smaller external components, while the internal

compensation and the soft-start minimize the

external component count: these feature help to

produce a compact solution for a wide current

load range.

The MP3418 is available in a small 8-pin

TSOT23 package.

FEATURES

•

Up to 96% Efficiency

•

0.8V Low Voltage Start-Up

•

0.6V-to-4V Input Range

•

1.8V-to-4V Output Range

•

Internal Synchronous Rectifier

•

1.2MHz Fixed-Frequency Switching

•

Typical 38µA Quiescent Current

•

Typical 0.1µA Shutdown Current

•

Current-Mode Control with Internal

Compensation

•

True Output Disconnect from Input

•

•

High Efficiency under Light-Load Conditions

•

Very Small External Components

•

Inrush Current Limiting and Internal Soft-

Start

•

Over-Voltage Protection

•

Short-Circuit Protection

•

TSOT23-8 Package

APPLICATIONS

•

Battery-Powered Products

•

Personal Medical Devices

•

Portable Media Players

•

Wireless Peripherals

•

Handheld Computers and Smartphones

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

status, please visit MPS website under Quality Assurance. “MPS” and “The

Future of Analog IC Technology” are Registered Trademarks of Monolithic

Power Systems, Inc.

TYPICAL APPLICATION CIRCUIT