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

Dual Intel
®
Xeon™ Processor Voltage Regulator Down (VRD) Guidelines
3
Contents
1 Scope....................................................................................................................................... 5
2 Electrical Specifications......................................................................................................... 8
2.1 Output Requirements ................................................................................................... 8
2.2 Input Voltage and Current........................................................................................... 15
2.3 Control Inputs ........................................................................................................... 16
2.4 Power Good Output (PWRGD) .................................................................................. 16
2.5 Intel Xeon Processor with 512- KB L2 Cache Power Sequencing............................. 17
2.6 Efficiency .................................................................................................................... 19
2.7 Fault Protection .......................................................................................................... 19
3 Design Considerations ......................................................................................................... 19
3.1 Controller Tolerance ................................................................................................... 20
3.2 Power Plane................................................................................................................. 20
3.3 Basic Layout ............................................................................................................... 20
3.4 Thermal Management ................................................................................................. 21