Dual Intel Xeon Processor Voltage Regulator Down (VRD) Design Guidelines

Dual Intel
®
Xeon™ Processor Voltage Regulator Down (VRD) Guidelines
4
Guideline Definitions
This document defines DC-to-DC converters to meet the power requirements of
computer systems using Intel
®
microprocessors. VRD requirements will vary according
to the needs of different computer systems and processors that a specific VRD is
expected to support. The “VRD” designation refers to an embedded voltage regulator on
a system board. Please refer to the VRM 9.1 document for Voltage Regulator Module
design guidelines.
The Dual Intel
®
Xeon™ Processor VRD Design Guidelines definition is specifically
intended to meet the needs of systems based on two Intel Xeon processors or Low
Voltage Intel Xeon processors (604-pin package only) in the 603-or 604-pin package.
Each guideline is placed into one of three categories. The category immediately follows
the section heading and is one of the following:
REQUIRED: An essential part of the design—necessary to meet processor voltage
and current specifications and follow processor layout guidelines.
EXPECTED: Part of Intel’s processor power definitions; necessary for consistency
among the designs of many systems and power devices. May be
specified or expanded by system OEMs.
PROPOSED: Normally met by this type of DC-to-DC converter and, therefore,
included as a design target. May be specified or expanded by system
OEMs.