O2Micro Granted Key Power Patent

GEORGE TOWN, Grand Cayman--(Business Wire)--
O2Micro® International Limited (NASDAQ®:OIIM) (SEHK:0457), a leading supplier of
innovative power management and security components, was issued 12 claims under
United States patent number 7,466,113 for its Break-Before-Make (BBM) Sensing
topology for drivers.

O2Micro`s patented invention for Direct Current-to-Direct Current (DC/DC)
drivers assists in minimizing a BBM delay time interval with optimal driving
performance. It is used in electronic devices, such as servers, desk top and
notebook computers, cellular phones, and PDAs.

Laszlo Lipcsei, vice president, O2Micro, remarked, "We are pleased with this
significant patent grant as this technology can be applied to a broad base of
products."

About O2Micro

Founded in April 1995, O2Micro develops and markets innovative power management,
and security components for the Computer, Consumer, Industrial, and
Communications markets. Products include Intelligent Lighting, Battery
Management, Power Management, and SmartCardBus® products.

O2Micro International maintains an extensive portfolio of intellectual property
with 11,830 patent claims granted, and over 14,000 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, SmartCardBus, and combinations thereof are registered
trademarks of O2Micro. All other 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.

O2Micro
Gary E. Abbott, 408-987-5920 ext. 8888
Director of Investor Relations
gary.abbott@o2micro.com

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