Monolithic Power Systems (NASDAQ:MPWR) reported quarterly earnings of $6.50 per share which beat the analyst consensus estimate of $5.87 by 10.73 percent. This is a 54.39 percent increase over earnings of $4.21 per share from the same period last year. The company reported quarterly sales of $980.642 million which beat the analyst consensus estimate of $902.496 million by 8.66 percent. This is a 47.56 percent increase over sales of $664.574 million the same period last year.