MPQ4485

36V, 6A, Step-Down Converter

with Dual USB Charging Ports Supporting

Type-C 5V @ 3A DFP Mode and BC1.2 CDP Mode

for Automotive, AEC-Q100 Qualified

MPQ4485 Rev.1.0

www.MonolithicPower.com

1

9/18/2017

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

© 2017 MPS. All Rights Reserved.

DESCRIPTION

The MPQ4485 integrates a monolithic, step-

down, switch-mode converter with two USB

current-limit

switches

and

charging

port

identification circuitry. The MPQ4485 achieves

6A of output current with excellent load and line

regulation over a wide input supply range.

The output of the USB switch is current-limited.

USB1 supports DCP schemes for battery

charging specification (BC1.2), divider mode,

1.2V/1.2V mode, and USB Type-C 5V @ 3A

DFP mode, eliminating the need for outside

user interaction. USB2 supports DCP and CDP

schemes.

Full protection features include hiccup current

limiting, output over-voltage protection (OVP),

and thermal shutdown.

The MPQ4485 requires a minimal number of

readily

available,

standard,

external

components and is available in a QFN-26

(5mmx5mm) package.

FEATURES

 Wide 6V to 36V Operating Input Voltage

Range

 Fixed 5.17V Output Voltage

 90mV Line Drop Compensation

 Accurate USB1/USB2 Output Current Limit

 18mΩ/15mΩ Low R

Power MOSFETs

 18mΩ/18mΩ Low R

USB1/USB2 Power MOSFETs

 450kHz Switching Frequency

 Forced CCM Operation

 Load Shedding versus Temperature for

MPQ4485GU-LS-AEC1

 USB Output Over-Voltage Protection (OVP)

 Fast Over-Current Response for USB

Switch

 Hiccup Current Limit

 Supports DCP Schemes for BC1.2, Divider

Mode, and 1.2V/1.2V Mode

 USB1 Supports USB Type-C 5V @ 3A

Mode, USB2 Supports CDP Mode

 ±8kV HBM ESD Rating for USB, DP, DM,

DP_OUT, and DM_OUT

 Available in a QFN-26 (5mmx5mm)

Package

 Available in AEC-Q100 Grade 1

APPLICATIONS

 USB Charging Downstream Port (CDP)

 USB Dedicated Charging Ports (DCP)

 USB Type-C Charging Port

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

MPS green status, please visit the MPS website under Quality Assurance.

“MPS”

and “The Future of Analog IC Technology” are registered trademarks of

Monolithic Power Systems, Inc.