Analysis of Static IR Drop Using Equivalent Circuit Modeling

This paper presents a static IR drop analysis method based on fast electromagnetic simulation and equivalent circuit theory. The Y-parameters of the multiport network are derived through the utilization of a modified kernel-independent multilevel fast multipole algorithm (MLFMA) based on non-cubic partition and efficient parallel computing for the rapid simulation of layered medium based printed circuit board (PCB) layouts. These Y-parameters are subsequently employed to extract the equivalent circuits under direct current (DC) condition. Moreover, by integrating the equivalent circuits of the voltage regulator module (VRM) and sink, the static IR drop analysis is performed through the combined electromagnetic-circuit simulation approach. A numerical example is given to demonstrate the accuracy of this method.