Volterra Semiconductor (Nasdaq: VLTR) is expected to report Q1 earnings on April 22. Here's what Wall Street wants to see:

The 10-second takeaway
 Comparing the upcoming quarter to the prior-year quarter, average analyst estimates predict Volterra Semiconductor's revenues will shrink -4.1% and EPS will compress -21.9%.

The average estimate for revenue is $40.3 million. On the bottom line, the average EPS estimate is $0.25.

Revenue details
 Last quarter, Volterra Semiconductor logged revenue of $40.3 million. GAAP reported sales were 3.8% higher than the prior-year quarter's $38.8 million.

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

EPS details
 Last quarter, non-GAAP EPS came in at $0.28. GAAP EPS of $0.18 for Q4 were 18% lower than the prior-year quarter's $0.22 per share.

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

Recent performance
 For the preceding quarter, gross margin was 57.3%, 100 basis points worse than the prior-year quarter. Operating margin was 13.5%, 270 basis points worse than the prior-year quarter. Net margin was 11.4%, 330 basis points worse than the prior-year quarter.

Looking ahead

The full year's average estimate for revenue is $172.3 million. The average EPS estimate is $1.17.

Investor sentiment
 The stock has a three-star rating (out of five) at Motley Fool CAPS, with 114 members out of 130 rating the stock outperform, and 16 members rating it underperform. Among 34 CAPS All-Star picks (recommendations by the highest-ranked CAPS members), 28 give Volterra Semiconductor a green thumbs-up, and six 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 $24.35.

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