O2Micro(R) International Limited (NASDAQ:OIIM), a leading supplier of innovative power management and security ICs to manufacturers of products for the computer, consumer, industrial, and communications markets, was granted 16 claims under United States patent number 6,813,173 for its Direct Current-to-Direct Current (DC/DC) Controller with improved transient response; a continuation of the invention issued January 2004 under United States patent number 6,678,178.

Dr. Alex Hartular, vice president of O2Micro's Intelligent Power business unit, comments, "This patented architecture allows O2Micro to deliver an even wider range of simple, high efficiency, cost-effective DC/DC solutions."

The resulting benefits include fewer parts, PCB space savings, and higher reliability for notebook and server applications.

About O2Micro

Founded in April 1995, O2Micro develops and markets innovative power management and security components for manufacturers of products for the computer, consumer, industrial, and communications markets. Products include Intelligent Lighting, Battery Charger and Management, DC/DC Controller, SmartCardBus(R) and MemoryCardBus(TM) ICs.

O2Micro International maintains an extensive portfolio of intellectual property with 1,943 patent claims granted, and over 5,000 more pending. The company maintains offices worldwide. Additional company and product information can be found on the company website at www.o2micro.com.

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.