MP2855

Dual-Loop, Digital, Multi-Phase Controller with PMBus Interface for AMD SVI2

Description

The MP2855 is a dual-loop, digital, multi-phase controller that provides power for the core of the AMD SVI2 2.0 platform. The device can work with MPS’s Intelli-Phase^TM products to complete the multi-phase voltage regulator (VR) solution with minimal external components. The MP2855 can be configured with up to 9-phase operation for rail 1 and up to 4-phase operation for rail 2.

The MP2855 provides an on-chip non-volatile memory (NVM) to store and restore device configurations. Device configurations and fault parameters can be easily configured or monitored via the PMBus/I²C interface. The device can monitor and report the output current (I_OUT) through the CS output from Intelli-Phase^TM products.

The MP2855 is based on unique, digital, multi-phase nonlinear control to provide a fast transient response to the load transient with minimal output capacitors. With only one power loop control method for both steady state and load transient, the power loop compensation is easy to configure.

The device is available in a TQFN-40 (5mmx5mm) package.

Features & Benefits

Multi-Phase, Dual-Output, Digital Controller
AMD SVI2 Compliant
PMBus/I²C-Compatible (1MHz Bus Speed)
Configurable Pin for PMBus Address
Built-In Non-Volatile Memory (NVM) to Store Custom Configurations
200kHz to 3MHz Switching Frequency (f_SW)
Automatic Loop Compensation
Fewer External Components than a Conventional Analog Controller
Best Transient Performance with Nonlinear Digital Control
Flexible Phase Assignment for Dual Rails
Automatic Phase-Shedding to Improve Overall Efficiency
Phase-to-Phase Active Current Balancing with Configurable Offsets for Thermal Balance
Input and Output Voltage, Current, and Power Monitoring
Regulator Temperature Monitoring
V_IN UVLO, Output OVP/UVP, OCP_TDC/OCP_SPIKE, OTP with No Action, Latch, Retry, or Hiccup Mode
Intelli-Phase^TM MOSFET Fault Type Detection
Auto-Records the VR Fault Type to the NVM
Digital Load-Line Regulation
Overclocking Mode by Adding Offset to Output Voltage (V_OUT)
RoHS-Compliant
Available in a TQFN-40 (5mmx5mm) Package