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Voltage Regulator-Down 11.1: Processor Power Delivery Design GuideThis chapter contains information common to all platforms implementing VRD 11.1. Chapters 2 and beyond contain VRD11.1 information unique to a given platform. Refer to both chapters 1 and the appropriate follow-on chapter relevant to the platform under design.This document defines the power delivery feature set necessary to support Intel processor VCC power delivery requirements for desktop and UP server/workstation computer systems using the LGA1366, LGA1156, and LGA775 sockets. This includes design recommendations for DC to DC regulators, which convert the input supply voltage to a processor consumable VCC voltage along with specific feature set implementation such as thermal monitoring and dynamic voltage identification.Hardware solutions for the VCC regulator are dependent upon the processors to be supported by a specific motherboard. VCC regulator design on a specific board must meet the specifications of all processors supported by that board. The voltage regulator configuration for a given processor is defined in that processor datasheet. In some instances, this data is not published and the proper mapping of processor to VRD configuration can be found from an authorized Intel representative.The voltage regulator-down (VRD) designation of this document refers to a regulator with all components mounted directly on the motherboard for intent of supporting a single processor. VR11.1 incorporates all of the VR11 functions with the following changes:• Iout feature to support LGA1366, and LGA1156 processors.• Power on configuration (POC), market segment identification (MSID) functions multiplexed onto VID lines during start up.• VID_SELECT, VR_FAN and VR10 VID support are removed.• A Power State Indicator (PSI#) input has been added.• Single step D-VID added for processor C-state entry and exit.Read the full Voltage Regulator-Down 11.1 Processor Power Delivery Design Guide.
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