Video: PDN Basics For Power Designers (Part 3): Impedance Matching Is Critical

by Steve Sandler, Picotest, Phoeniz, Ariz., How2Power Today, Sep 15 2014

Focus:
In this 3-min part 3 video, the presenter explains why the output impedance of a power converter needs to be matched to the impedance of the PDN in which it is used. The concept of matched impedance in RF and test applications is discussed. The effect of mismatches between VRM, PCB and load impedances is explained using a teeter totter analogy. Finally, references are provided for those who want to learn more about the issues discussed in this video series.

What you’ll learn:

• How to understand the impact of impedance mismatches in PDNs and why output impedance of the POL or VRM should be matched to the PDN

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