MP9447
High-Efficiency, Fast-Transient, 5A, 36V
Synchronous, Step-Down Converter
MP9447 Rev. 1.1 www.MonolithicPower.com 1
10/28/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
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
Output Adjustable from 0.8V to 0.9×V
IN
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
