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DesignCon 2019 Presentation Viewer

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High Fidelity Simulation Using Measurement-based VRM Models

Steve Sandler (Founder, Picotest.com)

Location: Chiphead Theater

Date: Wednesday, January 30

Time: 2:00pm - 2:40pm

Track: Chiphead Theater

Session Type: Chiphead Theater (Free)

Vault Recording: TBD

In the high-speed digital world, the voltage regulator module (VRM) is often neglected in the simulations or a simplistic resistor-inductor model is used to represent this VRM. While the resistor-inductor model is better than nothing, it misses most of the VRM noise. A switching VRM produces noise in many ways, including switching related ripple and spike noise. There is also noise due to switching frequency jitter. Other noise sources include input voltage related transients and turn-on overshoot. By following just a few simple rules, a fast, highly accurate model can be created from a simple measurement or two. Once the model is available, the design can be easily optimized and confidently applied in your project.