MP2884A Multi-Phase PWM Controller QFN-40

MP2884A Multi-Phase PWM Controller QFN-40

The MP2884A is a digital, multi-phase, pulse- width modulation (PWM) controller with digital PWM-VID interface compatible with the Open VReg specification.

Key Specifications

Features

• Programmable Multi-Phase up to Four Phases
• PWM-VID Interface Compatible with Open VReg Specification
• PMBus/I2C Compliant (1MHz Bus Speed)
• Pin Programmable for PMBus Address
• Built-In EEPROM to Store Custom Configurations
• Switching Frequency Range 200kHz to 5MHz
• Automatic Loop Compensation
• Fewer External Components than Conventional Analog Controller
• Best Transient Performance with Non- Linear Digital Control
• Flexible Phase Assignment

Typical Application Circuit

Applications

• Graphic Card Core Power
• Server Core Power
• Telecom and Networking Systems

Design Notes

• Rail sequencing order and delay are part of the SoC power-up contract; a wrong order latches the processor even though every rail is in spec.
• In multiphase designs, current balance depends on the loop matching between phases, so keep the layout symmetric.
• Digital interfaces (PMBus, I²C) need pull-ups to the correct rail and a defined state during power-up.
• Thermal design is a system problem here: the PMIC sits next to the load it feeds, so budget the shared copper, not the package alone.

Common Questions