Monolithic Power Systems (MPS) MPQ4253A Step-Down Converters

Monolithic Power Systems (MPS) MPQ4253A Step-Down Converters integrate switch-mode converters with two USB current-limit switches and charging port identification circuitry for each port. These converters buck and the USB2 output is always on if EN is high. The MPQ4253A converters achieve a 6A output current, with excellent load and line regulation over a wide input supply range. These step-down converters’ full protection features include hiccup current limiting, output Over-Voltage Protection (OVP), and thermal shutdown. The MPQ4253A converters require a minimal number of readily available standard external components and are available in a QFN-26 (5mm x 5mm) package. These converters are ideal for USB Dedicated Charging Ports (DCPs) and USB Type-C™ + Type-A hybrid charging ports.

Features

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 V_IN range
5.1V, 5.17V, or 5.3V selectable output voltages
90mV line drop compensation
Accurate USB1/USB2 output current limit
18mΩ/15mΩ low internal R_DS(ON) buck power MOSFETs

18mΩ/18mΩ low internal R_DS(ON) USB1/USB2 power MOSFETs
250kHz to 1MHz adjustable frequency range
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 (5mm x 5mm) package
Available in AEC-Q100 grade 1

Applications

USB Dedicated Charging Ports (DCPs)
USB Type-C + Type-A Hybrid charging ports

Monolithic Power Systems (MPS) MPQ4253A Step-Down Converters

Features

Applications

Application Diagram

Block Diagram

Characteristic Curve

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