Volterra Semiconductor (Nasdaq: VLTR) is expected to report Q3 earnings on Oct. 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 grow 6.7% and EPS will shrink -8.6%.

The average estimate for revenue is $44.1 million. On the bottom line, the average EPS estimate is $0.32.

Revenue details
 Last quarter, Volterra Semiconductor logged revenue of $43.6 million. GAAP reported sales were 4.5% higher than the prior-year quarter's $41.7 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 $0.32. GAAP EPS of $0.22 for Q2 were 10.0% higher than the prior-year quarter's $0.20 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 58.0%, 130 basis points better than the prior-year quarter. Operating margin was 17.2%, 80 basis points worse than the prior-year quarter. Net margin was 13.8%, 100 basis points better than the prior-year quarter.

Looking ahead

The full year's average estimate for revenue is $175.6 million. The average EPS estimate is $1.29.

Investor sentiment
 The stock has a two-star rating (out of five) at Motley Fool CAPS, with 96 members out of 113 rating the stock outperform, and 17 members rating it underperform. Among 28 CAPS All-Star picks (recommendations by the highest-ranked CAPS members), 24 give Volterra Semiconductor a green thumbs-up, and four 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 $35.70.

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