O2Micro Expands Portfolio of Highly-Integrated DC/DC Controllers

OZ8321 and OZ8322 DC/DC Controllers Extend Battery Life, Improve Efficiency and are Compliant with AMD's SVI2 Specification for Notebook Computer Applications

August 6, 2012. O2Micro® International Limited (NASDAQ Global Select Market: OIIM), a global leader in the design, development and marketing of high-performance integrated circuits and solutions, today announced the introduction of two new low cost, high efficiency Direct Current-to-Direct Current (DC/DC) converter controllers for notebook markets.

The expanding feature sets and performance requirements of today's notebook computers are driving demand for higher efficiency DC/DC controllers. With the integration of high speed CPU systems, the emphasis on current consumption and efficiency has increased proportionally.

Unlike most stand-alone DC/DC controllers, O2Micro's DC/DC controllers combine world-class expertise with a state-of-the-art, low noise design to enhance performance and optimize design integration. As a result, O2Micro's DC/DC controllers enable greater functionality in next generation notebooks by improving efficiency and enhancing overall CPU performance.

Laszlo Lipcsei, vice president of O2Micro, said, "O2Micro continues to develop circuits and components that improve the efficiency and performance of next generation notebook computing. Our new CPU DC/DC controllers, based on O2Micro's Constant-Ripple-Current® Technology, are compliant with AMD's SVI2 specification for its latest 'A' series, second generation Accelerated Processor Units (APUs) and are optimized for superior performance."

About the OZ8321 and OZ8322 DC/DC Controllers

The OZ8321 is a highly integrated DC/DC controller containing a dual phase controller with integrated drivers for the core rail and a single phase controller for the North Bridge (NB) rail. Both output voltages are programmed through a high speed serial bus, compliant with the SVI2 specification.

The OZ8322 is a highly integrated DC/DC controller containing a dual phase controller with integrated drivers for the AMD CPU core rail and a dual phase controller with external drivers for the North Bridge rail (companion chip: OZ8002). Both output voltages are programmed through a high speed serial bus, compliant with the SVI2 specification.

Product Availability and Additional Information

The OZ8321 and OZ8322 are available in a 40-pin QFN package. Both products are in high volume production now. Samples and evaluation boards are available for qualified customers.

For additional information, contact O2Micro sales representatives via our website at www.o2micro.com.

About O2Micro

Founded in April 1995, O2Micro develops and markets innovative power management and e-commerce components for the Computer, Consumer, Industrial, and Communications markets. Products include Intelligent Lighting, Battery Management, and Power Management.

O2Micro International maintains an extensive portfolio of intellectual property with 20,690 patent claims granted, and over 21,000 more pending. The company maintains offices worldwide. Additional company and product information can be found on the company website at www.o2micro.com.

O2Micro, the O2Micro logo, Constant-Ripple-Current, and combinations thereof are registered trademarks of O2Micro. All other trademarks or registered trademarks are the property of their respective owners.

Statements made in this release that are not historical, including statements regarding O2Micro's or management's intentions, hopes, beliefs, expectations, representations, projections, plans or predictions of the future, are forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Such statements involve risks and uncertainties that may cause actual results to differ materially from those set forth in these statements. Factors that could cause actual results to differ materially include risks and uncertainties such as reduced demand for products of electronic equipment manufacturers which include O2Micro's products due to adverse economic conditions in general or specifically affecting O2Micro's markets, technical difficulties and delays in the developments process, and errors in the products. You are also referred to the Form F-1 in connection with the company's initial public offering in August 2000, Form F-3 in connection with the company's public offering in November 2001, and the annual reports on Form 20-F, which identify important risk factors that could cause actual results to differ from those contained in the forward-looking statements. The company assumes no obligation to update or revise any forward-looking information, whether as a result of new information, future events or otherwise.

Contact Information:
Scott L. Anderson
Director of Investor Relations, O2Micro
Phone: 408.987.5920. x8888
Email: scott.anderson@o2micro.com

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