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Applications
1 Applications
1.1 Introduction and Terminology
This document defines the DC-to-DC converters to meet the processor power
requirements of the following platforms:
The requirements in this document will focus primarily on the Enterprise processors
based on Dual-Core Intel
®
Xeon
®
Processor-based Server and Quad-Core Intel
®
Xeon
®
Processor-based Server/Workstation platforms. Some requirements will vary
according to the needs of different computer systems and processors. The intent of this
document is to define the electrical, thermal and mechanical design specifications for
VRM/EVRD 11.0.
VRM – The voltage regulator module (VRM) designation in this document refers to a
voltage regulator that is plugged into a baseboard via a connector or soldered in with
signal and power leads, where the baseboard is designed to support more than one
processor. VRM output requirements in this document are intended to match the needs
of a set of microprocessors.
EVRD – The enterprise voltage regulator down (EVRD) designation in this document
refers to a voltage regulator that is permanently embedded on a baseboard. The EVRD
output requirements in this document are intended to match the needs of a set of
microprocessors. EVRD designs are only required to meet the specifications of a
specific baseboard and thus must meet the specifications of all the processors
supported by that baseboard.
‘1’ – In this document, refers to a high voltage level (V
OH
and V
IH
).
‘0’ – In this document, refers to a low voltage level (V
OL
and V
IL
).
‘X’ – In this document, refers to a high or low voltage level (Don’t Care).
‘#’ – Symbol after a signal name in this document, refers to an active low signal,
indicating that a signal is in the asserted state when driven to a low level.
The specifications in the respective processors’ Electrical, Mechanical, and Thermal
Specifications (EMTS) documents always take precedence over the data provided in
this document.
VRM/EVRD 11.0 incorporates functional changes from prior VRM and EVRD design
guidelines:
Table 1-1. VRM/EVRD 11.0 Supported Platforms and Processors
Dual-Core Intel® Xeon® 5000 Sequence Platform with Intel® 5000P Express Chipset, Intel® 5000V
Chipset, Intel® 5000X Chipset, Intel® 5100 Chipset, Intel® 5400A Chipset, or Intel® 5400B Chipset
Dual-Core Intel
®
Xeon
®
Processor
5000 Series
Dual-Core Intel
®
Xeon
®
Processor
5100 Series
Quad-Core Intel
®
Xeon
®
processor 5300 Series
Dual-Core Intel
®
Xeon
®
Processor
5200 Series
Quad-Core Intel
®
Xeon
®
Processor
5400 Series
Dual-Core Intel® Xeon® Processor 7000 Sequence-Based Platform with Intel® 7300 Chipset
Dual-Core Intel
®
Xeon
®
Processor
7200 Series
Quad-Core Intel
®
Xeon
®
processor
7300 Series