Balu Balakrishnan
Analyst · Needham & Company
Thanks, Joe, and good afternoon, everyone. Our fourth quarter results reflect the difficult business conditions felt across the semiconductor industry in recent months with revenues down 11% compared to the third quarter. However, after an extended period of soft bookings throughout the summer and into the fall, we saw a meaningful uptick in orders around the middle of the fourth quarter, resulting in a book-to-bill ratio of approximately 1 for the fourth quarter. While it is difficult to predict the trajectory of the recovery, it appears that the business conditions have stabilized and perhaps began to improve.
Based on these trends, we currently expect first quarter revenues of between $64 million and $70 million, a slight increase at the midpoint compared to the fourth quarter. Despite challenging business conditions, we generated record operating cash flow in 2011, and we are well-positioned to grow our top and bottom lines as cyclical headwinds abate, thanks to the progress we made last year winning designs, ramping new products, growing our customer base and reducing our manufacturing cost.
We also strengthened our position as the leading enabler of energy-efficient electronics and lighting, 2 of the most secular [ph] growth opportunities for the analog semiconductor industry. Last month, the California Energy Commission enacted mandatory efficiency standards for battery chargers like those used in power tools, electric toothbrushes, hair trimmers, uninterruptible power supplies and even electric golf carts. More than 170 million battery chargers are currently in service in the State of California alone, and the CEC estimates that the new standards will eventually save enough energy to power about 350,000 homes.
Effective February 2013, new devices will be required to meet the standards, which regulate both charging efficiency and power consumption during maintenance mode when the battery is fully charged. These standards apply to many power supplies not covered by the CEC's landmark 2007 standards for external power supplies and therefore, has a potential to cause another wave of redesign activity in the power supply market.
While standards like these continue to be a major factor in the power supply industry, market forces have an equally important role to play in driving energy efficiency. Manufacturers have recognized that consumers are increasingly concerned about the energy consumption in products they buy. And many have responded by designing their products to be far more efficient than the mandatory standards or even voluntary specs like Energy Star.
Over the past 2 years, we have rolled out a range of products called the 0 Series, aimed at helping manufacturers minimize standby waste, and in some cases, achieve the ultimate goal of 0 standby, an idea with a very powerful appeal to certain consumers. Our customers have shown a great deal of interest in the 0 standby concept, and that interest is now translating into design activity.
Our LinkZero chips have been designed into certain models by one of the world's largest TV manufacturers. And also, by a top-tier appliance manufacturer for the 0 standby washing machine scheduled for production in 2013. Under the top-tier appliance manufacturer has designed in a 3-chip combination of our TinySwitch, CAPZero and SENZero ICs demonstrating not only the strength of our product offerings, but ultralow standby, but also the higher silicon content now available to us in higher power applications like appliances, PCs and TVs. We expect both of these themes to be very important for us in the years ahead.
Overall, we saw double-digit growth in design wins in 2011, and we sold products to nearly 11,000 end customers during the year, 10% more than the prior year and twice the number we sold to just 4 years ago. This demonstrates not only the growth in our business, but also, a continued success in the effort we began many years ago to diversify our revenue base and increase our presence in more fragmented markets like consumer appliances, LED lighting and industrial applications.
These revenue streams are stickier and more stable than other markets, and they are markets where benefits of integration such as reliability, ease of design and energy efficiency are most highly valued. They're also the markets that require an extensive global sales and support infrastructure and a strong track record of quality, areas where we have an advantage over many of our smaller competitors. More than half of our revenue in 2011 came from high reliability applications like appliances, industrial applications, LED lighting, desktop PCs and servers.
Meanwhile, revenues from more volatile cellphone charger market accounted for less than 20% of our sales last year, the smallest percentage in our history. In spite of the fact that we remain the market leader in cellphone charger ICs with over $55 million in sales. We expect to remain a leader in cellphone chargers and other high-volume markets in the years ahead, even as we -- as our revenue mix becomes further diversified into industrial applications, TVs, appliances, LED lighting and other high reliability applications.
I believe we are unmatched in our ability to compete across the full range of power supply application with strong market share in both high-volume, cost-driven markets and the more fragmented high reliability markets. The common denominator is integration, which brings reliability, efficiency and ease of design without increasing system costs.
Another unique advantage we possess is our leading-edge High-Voltage technology, which enables our highly reliable integrated MOSFETs to compete head-to-head with the cheaper, less robust bipolar transistors specified by discrete competitors for many high volume applications. Another area where we made good progress in 2011 was in reducing our manufacturing costs. Throughout last year, we talked about the efforts we have underway to help offset gross margin pressure from higher input costs, particularly from high wafer cost due to the unfavorable dollar to yen exchange rate, as well as the higher price of gold.
Our cost-reduction efforts are beginning to pay off starting with the sequential increase of 60 basis points in our fourth quarter gross margin, and we believe further improvement is likely in the first quarter, in spite of lower production volumes. While the trend beyond Q1 depends somewhat on factors outside of our control, we do believe our full year gross margin will be up compared to 2011, and that we will exit the year with a gross margin significantly higher than what we reported for the fourth quarter of 2011.
In closing, while 2011 was a challenging year in many ways, we believe we executed well on things within our control. We are encouraged by the continued momentum of energy efficiency trends, both in electronics and in lighting, and we think we are well-positioned for 2012 and beyond.
With that, I'll turn the call over to Sandeep for a review of the financials.