MP2855
Dual-Loop, Digital, Multi-Phase Controller
with PMBus Interface for AMD SVI2
DESCRIPTION
FEATURES
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.
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
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.
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
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.
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
All MPS parts are lead-free, halogen-free, and adhere to the RoHS directive.
For MPS green status, please visit the MPS website under Quality
Assurance. “MPS”, the MPS logo, and “Simple, Easy Solutions” are
trademarks of Monolithic Power Systems, Inc. or its subsidiaries.
Notice: The information in this document is subject to change without notice. Users should warrant and guarantee that third-
party Intellectual Property rights are not infringed upon when integrating MPS products into any application. MPS will not assume
any legal responsibility for any said applications.
MP2855 Rev. 1.0
7/13/2020
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2021 MPS. All Rights Reserved.
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