New Methodology to Include VR Model in PDN Frequency Domain Analysis and Correlation to Time Domain Transient Simulation

In Power Integrity analysis, target impedance in frequency domain is frequently used to check potential risk of PDN (Power Delivery Network) design. This paper discusses new methodology to model VR (voltage regulator) and DC/DC convertor characteristic in target impedance analysis. Then, target impedance analysis with VR model taken into account is performed to visualize VR effect in frequency domain. Finally, correlation to time domain transient simulation are performed to verify accuracy of VR model in actual board design.