FOM (Figure of Merit) Analysis for Low Voltage Power MOSFETs in DC-DC Converter

FOM is a generally accepted performance and efficiency indicator for power MOSFETs. However, it is found that the traditional FOM can no longer provide a quick measure of the overall device performance for switched mode power supplies, especially for DC-DC converters using the low voltage (sub-10V) power MOSFETs fabricated in a deep sub-micron CMOS technology. To give a subjective analysis, a new comparison method has been proposed to compare the true overall device performance and power conversion efficiency.