MPQ4473-AEC1

High-Efficiency, Fast-Transient, 3.5A, 36V

Synchronous, Step-Down Converter with

AEC-Q100 Qualified

MPQ4473 Rev. 1.01

www.MonolithicPower.com

1

5/24/2016

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

© 2016 MPS. All Rights Reserved.

DESCRIPTION

The MPQ4473 is a fully integrated, high-

frequency, synchronous, rectified, step-down,

switch-mode converter. It offers a compact

solution to achieve a 3.5A, continuous-output

current over a wide input-supply range with

excellent load and line regulation. It provides

fast, transient response and good stability for

wide

input-supply

and

load

range.

The

MPQ4473 operates at high efficiency over a

wide-output-current load range.

MPQ4473 has full protection features including,

short-circuit

protection

(SCP),

over-current

protection

(OCP),

under-voltage

protection

(UVP), and thermal shutdown (TSD).

The MPQ4473 requires minimal, readily available,

standard, external components, and is available

in a compact 3mmx4mm, 20-pin, QFN package.

FEATURES

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

 Guaranteed 3.5A, Continuous Output

Current

 Internal 40mΩ High-Side, 20mΩ Low-Side

Power MOSFETs

 Proprietary Switching-Loss-Reduction

Technology

 1% Reference Voltage

 Programmable Soft-Start Time

 Low Drop-Out Mode

 200kHz-to-1MHz Switching Frequency

 SCP, OCP, UVP, and Thermal Shutdown

 Output Adjustable from 0.8V to 0.9×V

IN

 Available in a 3mmx4mm, 20-pin, QFN

Package

 Available in AEC-Q100 Grade 1

APPLICATIONS



Notebook Systems and I/O Power



Automotive Systems



Networking Systems



Industrial Supplies



Optical Communications Systems



Distributed Power and POL Systems

All MPS parts are lead-free, halogen 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