Power management chips maker Monolithic Power Systems (NASDAQ:MPWR) will be reporting earnings tomorrow after the bell. Here's what investors should know.

Monolithic Power Systems met analysts' revenue expectations last quarter, reporting revenues of $454 million, down 1.3% year on year. It was a mixed quarter for the company, with a slight improvement in its inventory levels but a decline in its gross margin.

Is Monolithic Power Systems a buy or sell going into earnings? Read our full analysis here, it's free.

This quarter, analysts are expecting Monolithic Power Systems's revenue to decline 1.4% year on year to $445 million, a reversal from the 19.4% increase it recorded in the same quarter last year. Adjusted earnings are expected to come in at $2.64 per share.

The majority of analysts covering the company have reconfirmed their estimates over the last 30 days, suggesting they anticipate the business to stay the course heading into earnings. Monolithic Power Systems has only missed Wall Street's revenue estimates once over the last two years, exceeding top-line expectations by 1.7% on average.

Looking at Monolithic Power Systems's peers in the analog semiconductors segment, some have already reported their Q1 results, giving us a hint as to what we can expect. Texas Instruments's revenues decreased 16.4% year on year, beating analysts' expectations by 1.4%, and Impinj reported a revenue decline of 10.6%, topping estimates by 4.4%. Texas Instruments traded up 5.7% following the results while Impinj was also up 28.8%.

Read our full analysis of Texas Instruments's results here and Impinj's results here.

Investors in the analog semiconductors segment have had fairly steady hands going into earnings, with share prices down 1.1% on average over the last month. Monolithic Power Systems is up 1.9% during the same time and is heading into earnings with an average analyst price target of $758.1 (compared to the current share price of $681.01).

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