MP2953B

Digital Multi-Phase Controller

with PMBus Interface for VR12.5

MP2953B Rev. 1.01

www.MonolithicPower.com

1

10/9/2015

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

© 2015 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP2953B is a digital multi-phase controller

that provides power for the core of the INTEL

VR12.5 platform. It works with MPS’ Intelli-

Phase products to complete the multi-phase VR

solution with minimal external components. It

can be configured for 1 ~ 6 phase operation.

The MP2953B provides on-chip EEPROM to

store and restore device configurations. Device

configurations and fault parameters are easy to

program or monitor using the PMBus interface.

The MP2953B monitors and reports the output

current through CS output from Intelli-Phase

products.

The MP2953B is based on a unique digital

multi-phase, non-linear control to provide fast

transient response to 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

easily configured.

FEATURES

• 6-Phase Digital PWM Controller

• Intel’s VR12.5 Compliant

• PMBus Compliant

• Serial VID Interface for Programming and

Monitoring

• Pin Programmable SVID registers

• Built-In

EEPROM

to

Store

Custom

Configurations

• Automatic Loop Compensation

• Less

External

Components

than

Conventional Analog Controllers

• Phase-Shedding at Light Load to Provide

High Efficiency

• Phase-to-Phase Active Current Balancing

• Input and Output Voltage, Current, and

Power Monitoring

• Regulator Temperature Monitoring

• Open-Drain

FAULT#

Signal

for

Fault

Notification

• RVP/OVP/UVP/OCP/OTP/UVLO Protection

with Options of No Action, Latch, Retry, or

Hiccup

• Adjustable Load-Line Regulation

• RoHS Compliant 5mmx5mm QFN-40

APPLICATIONS

• Server Core Voltage

• Graphic Card Core Regulators

• 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” and “The Future of Analog IC Technology” are registered trademarks of

Monolithic Power Systems, Inc.