O2Micro International Limited (NASDAQ: OIIM), a leading supplier

of innovative power management ICs to mobile computer

and communications manufacturers, was recently granted a United States

patent, with 42 claims, for its Intelligent Inverter family of



This unique Adaptive Learning Inverter controller, patent number

6,259,615, provides highly efficient power conversion at a fixed

frequency using a zero-voltage-switching technique. Adaptive Learning

is used to determine the optimum operating frequency for this IC with

a given load. With its simplified Liquid Crystal Display (LCD) panel

interface, this Intelligent Inverter IC operates with different

manufacturer's LCD panels without the need to retune the output



"This significant patented technology alleviates the complexity of

a single-stage Inverter design and provides the industry with a

high-efficiency, designer-friendly Inverter controller", said Dr. Yung

Lin, Vice President of the Intelligent Inverter Group.


This Intelligent Inverter IC builds on O2Micro's patented single

stage architecture, improving the lamp's light output and allowing for

a smaller, low cost design. With its wide range voltage input, this

efficient, simple design is the leading power management solution for

most LCD-based applications.


About O2Micro


Founded in March 1995, O2Micro designs, develops and markets

innovative power management and security components for mobile

communication, computer, Internet appliance, and LCD products.

Products include AudioDJ(TM), SmartCardBus(R) for secure on line

e-commerce, LCD Backlight Inverters and Battery Management IC's.

O2Micro maintains an extensive portfolio of intellectual property

with 268 patent claims granted, and over 400 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 1955. 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

development process, and errors in the products. You are also referred

to the documents filed by O2Micro with the SEC from time to time,

including but not limited to the Form F-1 in connection with the

company's initial public offering in August 2000, which identify

important risk factors that could cause actual results to differ from

those contained in the forward-looking statements.



Grace Louh, 408/987-5920 x8051