Monolithic Power Systems (MPS) MPQ4276A Buck Converters

Monolithic Power Systems (MPS) MPQ4276A Buck Converters integrate a monolithic, step-down switch-mode converter with two USB current-limit switches. These buck converters achieve a 6A output current (I_OUT) across a wide input supply range. The MPQ4276A converters offer dual USB charging ports and Pulse Frequency Modulation (PFM) mode under light load conditions to improve light-load efficiency. These converters feature hiccup current limiting, Output Over-Voltage Protection (OVP), and thermal shutdown. The MPQ4276A converters are AEC-Q100 Grade 1 qualified and available in QFN-26 (5mmx5mm) packages. Typical applications include USB hubs and USB Type-C™ charging ports.

Features

Automatic Pulse-Frequency Modulation (PFM) and Pulse-Width Modulation (PWM) modes
6V to 36V operating input voltage (V_IN) range
Selectable output voltage (V_OUT)
21mΩ and 15mΩ low on-resistance (R_DS(ON)) internal power MOSFETs
18mΩ and 18mΩ low R_DS(ON) internal power MOSFETs for USB1 and USB2
200kHz to 2.2MHz adjustable frequency range
5A output current (I_OUT) limit of USB1 and USB2
Hiccup current limit for both the buck converter and USB switches

Fault indication for USB1 and USB2
Supports USB Type-C™ 5V @3A mode
Line drop compensation
Passes USB-IF Type-C certification test
Passes Apple MFI certification test
±8kV Human Body Model (HBM) ESD rating for USB1 and USB2
Available in a QFN-26 (5mm x 5mm) package
AEC-Q100 Grade 1 certified

Applications

USB hubs
USB Type-C charging ports

Monolithic Power Systems (MPS) MPQ4276A Buck Converters

Features

Applications

Typical Application Circuit

Block Diagram

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