Patent Issued for O2Micro's Battery Voltage Monitoring Methodology

Tue Feb 19, 2013 8:30am EST

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GEORGE TOWN, Grand Cayman, Feb. 19, 2013 (GLOBE NEWSWIRE) -- O2Micro® International Limited
(Nasdaq:OIIM), a global leader in the design, development and marketing of high-performance
integrated circuits and solutions, today announced that it was issued 19 claims under United
States patent number 8,310,206 and 20 claims under United States patent number 8,294,424 for its
Battery Voltage Monitoring methodology. Patent number 8,294,424 is a continuation of the invention
issued October 2012 under United States patent number 7,825,627.

This patented methodology monitors battery cell voltage. If a predefined low voltage threshold is
reached, a safety function is initiated.

Bill Densham, strategic marketing manager, O2Micro, said, "O2Micro's patented methodology provides
a quick under-voltage detection scheme to safeguard the battery in a timely fashion, unlike
conventional circuitries."

About O2Micro

Founded in April 1995, O2Micro develops and markets innovative power management components for the
Computer, Consumer, Industrial, Automotive and Communications markets. Products include LED
General Lighting, Backlighting, Battery Management and Power Management.

O2Micro International maintains an extensive portfolio of intellectual property with 22,390 patent
claims granted, and over 24,000 more pending. The company maintains offices worldwide. Additional
company and product information can be found on the company website at www.o2micro.com
http://www.globenewswire.com/newsroom/ctr?d=10022062&l=6&a=www.o2micro.com&u=http%3A%2F%2Fwww.o2micro.com%2F
.

O2Micro, the O2Micro logo, 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.

The O2Micro International Limited logo is available at
http://www.globenewswire.com/newsroom/prs/?pkgid=6567
http://www.globenewswire.com/newsroom/ctr?d=10022062&l=9&u=http%3A%2F%2Fwww.globenewswire.com%2Fnewsroom%2Fprs%2F%3Fpkgid%3D6567

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

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