O2Micro Receives Selector Circuit Architecture 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 21 claims under
United States patent number 7,489,110 for its Selector Circuit for Power
Management in multiple battery systems; a continuation of the invention issued
March 2006 under United States patent number 7,009,364.

O2Micro`s Selector Circuit power management architecture, used with multiple
battery systems, permits the selection of a power source among multiple battery
sources, and enables verification of power conditions and override instructions
from an electronic device`s power management unit.

"This power source selection technique allows parallel operation of two or more
batteries and enhances power supply safety and battery life in the power supply
block of various electronic applications, such as notebook computers," stated
Dr. Alex Hartular, vice president, O2Micro.

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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