System accuracy analysis of the multiphase voltage regulator module

This paper analyzes the system accuracy of the multiphase voltage regulator module (VRM), and identifies the influential factors contributing to the system errors. PSpice Monte Carlo analysis, a more realistic statistical method of system accuracy prediction, is used to simulate the load line of the multiphase voltage regulator module for the next generation microprocessors. The Monte Carlo simulation result is compared with a worst-case analysis, a root-sum-square method, and is verified by the experimental results of a three phase synchronous buck converter.