Volterra Semiconductor (Nasdaq: VLTR) reported earnings on April 22. Here are the numbers you need to know.

The 10-second takeaway
 For the quarter ended March 31 (Q1), Volterra Semiconductor met expectations on revenues and missed estimates on earnings per share.

Compared to the prior-year quarter, revenue contracted. Non-GAAP earnings per share dropped significantly. GAAP earnings per share contracted significantly.

Margins dropped across the board.

Revenue details
 Volterra Semiconductor recorded revenue of $39.9 million. The 11 analysts polled by S&P Capital IQ expected a top line of $40.3 million on the same basis. GAAP reported sales were 5.1% lower than the prior-year quarter's $42.1 million.

Source: S&P Capital IQ. Quarterly periods. Dollar amounts in millions. Non-GAAP figures may vary to maintain comparability with estimates.

EPS details
 EPS came in at $0.22. The 10 earnings estimates compiled by S&P Capital IQ anticipated $0.25 per share. Non-GAAP EPS of $0.22 for Q1 were 31% lower than the prior-year quarter's $0.32 per share. GAAP EPS of $0.12 for Q1 were 48% lower than the prior-year quarter's $0.23 per share.

Source: S&P Capital IQ. Quarterly periods. Non-GAAP figures may vary to maintain comparability with estimates.

Margin details
 For the quarter, gross margin was 56.9%, 60 basis points worse than the prior-year quarter. Operating margin was 10.0%, 630 basis points worse than the prior-year quarter. Net margin was 7.6%, 710 basis points worse than the prior-year quarter. (Margins calculated in GAAP terms.)

Looking ahead
 Next quarter's average estimate for revenue is $41.4 million. On the bottom line, the average EPS estimate is $0.28.

Next year's average estimate for revenue is $168.8 million. The average EPS estimate is $1.12.

Investor sentiment
 The stock has a two-star rating (out of five) at Motley Fool CAPS, with 113 members out of 130 rating the stock outperform, and 17 members rating it underperform. Among 34 CAPS All-Star picks (recommendations by the highest-ranked CAPS members), 27 give Volterra Semiconductor a green thumbs-up, and seven give it a red thumbs-down.

Of Wall Street recommendations tracked by S&P Capital IQ, the average opinion on Volterra Semiconductor is outperform, with an average price target of $21.67.

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