MPQ4253A
36V, Step-Down Converter Supports One
Type-A, One Type-C Dual USB Charging
Ports for Automotive, AEC-Q100 Qualified
DESCRIPTION
FEATURES
The MPQ4253A integrates a monolithic, step-
down, switch-mode converter with two USB
current-limit switches and charging port
identification circuitry for each port. The
MPQ4253A achieves 6A of output current, with
excellent load and line regulation over a wide
input supply range.
All-In-One Type-C + Type-A Solution
Type-C Auto-Enters 1.5A Load Capability
when the Type-A Port Detects a Device Is
Plugged In
Default Frequency Spread Spectrum Based
on 480kHz (FREQ = Float)
Auto-PFM/PWM Operation
Wide 6V to 36V Operating VIN Range
Selectable Output Voltage: 5.1V, 5.17V, or
5.3V
90mV Line Drop Compensation
Accurate USB1/USB2 Output Current Limit
18mΩ/15mΩ Low Internal RDS(ON) Buck
Power MOSFETs
18mΩ/18mΩ Low Internal RDS(ON)
USB1/USB2 Power MOSFETs
250kHz to 1MHz Adjustable Frequency
Hiccup Current Limit for Both Buck and USB
Supports DCP Schemes for BC1.2, Apple
Divider 3 Mode, and 1.2V/1.2V Mode
Supports USB Type-C 5V @ 3A DFP Mode
Available in a QFN-26 (5mmx5mm)
Package
The USB outputs are fixed as one Type-A port
and one Type-C port. Each USB switch is
current-limited. The USB1 port supports USB
Type-C 5V @ 3A DFP mode. The USB2 port
supports DCP schemes for battery charging
specification (BC1.2), Apple divider 3 mode, and
1.2V/1.2V mode, eliminating the need for outside
user interaction.
The MPQ4253A buck and USB2 output is
always on if EN is high. The USB1 port capability
automatically changes to 1.5A when USB2
detects a device is plugged in.
The step-down converter uses peak current
mode control to regulate the output voltage.
Under light-load conditions, it enters PFM mode
to get high light-load efficiency.
Available in AEC-Q100 Grade 1
Full protection features include hiccup current
limiting, output over-voltage protection (OVP),
and thermal shutdown. The device supports
load-shedding mode for the USB1 port. When
entering load-shedding, the Type-C advertised
current capability changes to 1.5A.
APPLICATIONS
USB Dedicated Charging Ports (DCPs)
USB Type-C + Type-A Hybrid Charging
Ports
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”, the MPS logo, and “Simple, Easy Solutions” are
trademarks of Monolithic Power Systems, Inc. or its subsidiaries.
The MPQ4253A requires a minimal number of
readily available, standard external components,
and is available in a QFN-26 (5mmx5mm)
package.
MPQ4253A Rev. 1.0
4/8/2020
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2020 MPS. All Rights Reserved.
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