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-PhaseTM 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 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 output current through the CS output

from Intelli-PhaseTM products.

The MP2855 is based on unique, digital, multiphase,

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

 Multi-Phase, Dual-Output, Digital Controller

 AMD SVI2 Compliant

 PMBus/I2C-Compatible (1MHz Bus Speed)

 Configurable Pin for PMBus Address

 Built-In NVM to Store Custom

Configurations

 200kHz to 3MHz Switching Frequency

 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

 VIN UVLO, Output OVP/UVP,

OCP_TDC/OCP_SPIKE, OTP with No

Action, Latch, Retry, or Hiccup Mode

 Intelli-PhaseTM 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

 RoHS-Compliant

 Available in a TQFN-40 (5mmx5mm)

Package

APPLICATIONS

 AMD Fusion CPU/GPU Core Power

 DDRs

 Telecom and Networking Systems

 Base Stations