Monolithic Power Systems (NASDAQ:MPWR) reported quarterly earnings of $5.10 per share which beat the analyst consensus estimate of $4.89 by 4.29 percent. This is a 26.24 percent increase over earnings of $4.04 per share from the same period last year. The company reported quarterly sales of $804.185 million which beat the analyst consensus estimate of $781.330 million by 2.93 percent. This is a 26.14 percent increase over sales of $637.554 million the same period last year.