Digital Twin PI Simulations for 2000 Amp AI, Cloud Compute, and Multi-Die Packages
Presented by Keysight
Delivering thousands of amps to the next generation of high-speed digital designs is fast becoming the biggest design challenge for the next generation of custom multi-die packages, AI Chips, and cloud server applications. End-to-end power integrity digital twins with multiphase voltage regulators, PCB PDN with 100’s of capacitors, and dynamic loads are critical for mitigating expensive hardware failures when working with thousands of amps. This presentation will explore the model fidelity trade-offs and lessons learned from simulating the Picotest 2000 Amp Transient Load Stepper demo board with a 55-phase MPS horizontal power delivery topology and over 700 decoupling capacitors.
The digital twin PI simulations will be demonstrated using Keysight Power Integrity designer tools. Keysight EDA Power Integrity designer tools in the ADS environment bring together a full workflow to solve the challenge of designing for high current low voltage power delivery. The solution includes DC IR Drop with electrothermal, AC EM with Decap optimization, and Conducted EMI with dynamic DC/DC regulator switching models. The solution is well integrated with multiple time domain and frequency domain solvers including Harmonic Balance (HB) for fast steady-state solutions and spectral data. HB works with the latest in state-space behavioral models for cascaded and parallel voltage regulators. Traditional frequency domain analysis with target impedance also includes the Non-Invasive Stability Margin for assessing phase margin to mitigate resonances by designing for low Q flat impedance.