MP2853 Multi-Phase Controller QFN-40

MP2853 Multi-Phase Controller QFN-40

The MP2853 is a dual-loop, digital, multi-phase controller that provides power for the core of the AMD SVI 2.0 platform.

Key Specifications

Features

• Multi-Phase, Dual-Output, Digital Controller
• AMD SVI 2.0 Compliant
• Supports 3-Bit PVID Mode
• PMBusTM/I2C Compliant (1MHz Bus Speed)
• Pin Programmable for PMBusTM Address
• Built-In EEPROM to Store Custom Configurations
• Switching Frequency Range from 200kHz to 3MHz
• Digital Load-Line Regulation
• Over-Clocking Mode by Adding Offset to Output Voltage
• Automatic Loop Compensation

Typical Application Circuit

Applications

• AMD Fusion CPU/GPU 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