MP9447

High-Efficiency, Fast-Transient, 5A, 36V

Synchronous, Step-Down Converter

MP9447 Rev. 1.2

www.MonolithicPower.com

1

1/5/2016

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

© 2016 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP9447 is a fully-integrated, high-

frequency, synchronous, rectified, step-down,

switch-mode converter. It offers a very compact

solution to achieve a 5A, continuous-output

current over a wide input-supply range with

excellent load and line regulation. It also

provides fast transient response and good

stability for wide input-supply and load range.

The MP9447 operates at high efficiency over a

wide output current load range.

Full protection features include SCP, OCP, UVP,

and thermal shutdown.

The MP9447 requires a minimal number of

readily-available, standard, external components,

and is available in a space-saving 3mm×4mm,

20-pin, QFN package.

FEATURES

 Wide 4.5V-to-36V Operating Input Range

 Guaranteed 5A, Continuous Output Current

 Internal 65mΩ High-Side, 30mΩ Low-Side

Power MOSFETs

 Proprietary Switching-Loss-Reduction

Technology

 1.5% Reference Voltage

 Programmable Soft-Start Time

 Low Drop-out Mode

 200kHz-to-650kHz Switching Frequency

 SCP, OCP, UVP, and Thermal Shutdown

 Available in a 3×4mm 20-pin QFN Package

APPLICATIONS

 General Consumer

 USB Power Supplies

 Cigarette Lighter Adapters

 Power Supply for Chargers

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