Some issues on the design of a voltage regulator module (VRM) for microprocessor power supply

The lower voltage and higher current demands of future microprocessors could have a severe impact on the quality of power delivered to the CPU. Due to the unpredictable voltage drop caused by large current flow in the cable, a precise voltage regulation and good transient response is very difficult achieved. The approach to overcome this problem is to resort to the point-of-load regulation method, popularly known as the voltage regulator module (VRM). This paper describes some of the issues involved in designing such a VRM.