The MP28167GQ-Z from Monolithic Power Systems (MPS) is a highly integrated synchronous four-switch buck-boost DC-DC converter designed to regulate power when the input voltage is either above or below the target output voltage. It provides a fixed 5V output with a maximum output current of 3A, making it suitable for electronic systems requiring a regulated 5V power rail.
The device supports a wide input voltage range of 2.8V to 22V. It uses constant-on-time control in buck mode and constant-off-time control in boost mode to help improve load transient response and maintain smooth transitions between operating modes. The converter operates at a fixed switching frequency of 500kHz and supports forced PWM operation.
The MP28167GQ-Z integrates four low-RDS(on) power MOSFETs and features an adjustable output constant-current limit, helping reduce external component requirements and simplify power supply design. Integrated protection features include overcurrent protection, overvoltage protection, undervoltage protection, output overvoltage and short-circuit hiccup protection, and thermal shutdown.
Housed in a compact 16-pin QFN package measuring 3mm × 3mm, the device is suitable for space-constrained PCB layouts. Typical applications include USB PD sourcing ports, buck-boost bus supplies, and other power management systems requiring a wide input range and a fixed 5V output.
Key Features:
- Brand: Monolithic Power Systems (MPS)
- Manufacturer Part Number: MP28167GQ-Z
- Component Type: Synchronous Four-Switch Buck-Boost Converter
- Input Voltage Range: 2.8V–22V
- Fixed Output Voltage: 5V
- Maximum Output Current: 3A
- Input Current Capability: Up to 4A, depending on operating conditions
- Switching Frequency: 500kHz
- Operating Mode: Forced PWM
- Integrated Power Devices: Four Power MOSFETs
- Current Limiting: Adjustable Output Constant-Current Limit
- Protection Features: Overcurrent, Overvoltage, Undervoltage, Short-Circuit, and Overtemperature Protection
- Package: QFN-16
- Package Dimensions: 3mm × 3mm
- Applications: USB PD Sourcing Ports, Buck-Boost Bus Supplies, and Portable Electronics Power Management
Before purchasing or integrating this component, consult the official MPS datasheet to verify input and output conditions, external inductor and capacitor selection, thermal design, and current-limit settings.
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