MP9181

High Efficiency, Fast Transient, 3A, 4.5V-20V Input

Synchronous Step-down Converter

in a Tiny 2mmx3mm QFN12 Package

MP9181 Rev 1.01

www.MonolithicPower.com

1

12/10/2012

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

© 2012 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP9181 is a fully-integrated, high-

efficiency, synchronous, step-down, switch

mode converter. It offers a very compact

solution that can achieve 3A continuous output

current over a wide input supply range with

excellent load and line regulation. This device

operates with high efficiency over a wide

output-current load range.

Constant-On-Time

(COT)

control

mode

provides fast transient response and eases loop

stabilization.

Full protection features include SCP, OCP,

UVP, and thermal shut down.

The MP9181 requires a minimal number of

readily-available standard external components.

This device is available in a space-saving

2mmx3mm 12-pin QFN package.

FEATURES

• Compatible with Intel Thunderbolt Specs

• Wide 4.5V to 20V Operating Input Range

• 3A Output Current

• Proprietary Switching Loss Reduction

Technique

• Up to 95% Peak Efficiency

• High Light Load Efficiency

• Soft Start-up/Shutdown

• Programmable Switching Frequency

• SCP, OCP, UVP Protection and Thermal

Shutdown

• Hiccup Mode during OCP

• Power Good Indicator

• Ultra-small (2mmx3mm) QFN Package

APPLICATIONS

•

Networking/Communication Systems

•

System I/O Power

•

Distributed Power Systems

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