Summary
2019 Joint International Symposium on Electromagnetic Compatibility and Asia-Pacific International Symposium on Electromagnetic Compatibility, Sapporo
2019
Session Number:WedAM2B
Session:
Number:WedAM2B.2
Design Technique on Reduction of Power Cross Regulation and Coupling in Data Center Microprocessor Power
Patt Chang, Yuan Liang Li, Falconee Lee,
pp.-
Publication Date:2016/10/5
Online ISSN:2188-5079
DOI:10.34385/proc.58.WedAM2B.2
Summary:
An analytical dual power rail simulation methodology is essential for evaluating cross regulation issues in core power designs with low-cost and multilayer printed circuit boards (PCB). With conventional validation approach, the cross regulation is a combinative result of complex power delivery networks (PDNs) and the performances of voltage regulators. Meanwhile, the measurements are usually not informative and inefficient to distinguish the root cause and help designers come up with an improvement plan. Fortunately, the analytic approach makes it possible to find the layout issues that could lead to serious cross regulations. With the analytic approach, the cross regulation problem can be simplified and modeled with distributed power delivery networks. The analytical predictions on cross regulation from power delivery impedance are more intuitive from the distributed power delivery networks. In this paper, this approach is further extended to compare two different layout schemes. Engineering implications on reducing the cross regulation in a multi-layer PCB will be discussed through a series of simulation examples.