Jury Finds in Favor of Power Integrations in Key Patent Infringement Lawsuit

October 18, 1999

SUNNYVALE, CALIF. - October 18, 1999 -- Power Integrations, Inc. (NASDAQ: POWI), today announced that it was awarded $32.3 million in damages in a patent infringement lawsuit it initiated against Motorola Corporation (NYSE: MOT) in August of 1998.

The unanimous decision reached by a jury of nine just after midnight on Friday, October 15, found that Motorola willfully infringed one of Power Integrations' patents for high-voltage power conversion integrated circuits.

"Our business model is based on the development and marketing of proprietary products that are protected by a strong patent portfolio," said Howard Earhart, president and chief executive officer. "We believe the outcome of this trial reaffirms the strength of our intellectual property."

The statements in this news release, other than the historical financial information, may contain forward-looking statements that involve risks and uncertainties that could cause actual results to differ from anticipated results. Further information on risk factors that could affect the company's results is detailed in the company's Annual Report on Form 10-K for the year ended Dec. 31, 1998, as filed with the Securities and Exchange Commission, as well as the Form 10-Q for the quarter ended March 31, 1999.

About Power Integrations

Power Integrations, Inc. is a leading supplier of high-voltage analog integrated circuits for use in AC to DC power conversion. For more information, visit the company's web site at: www.powerint.com or contact the company at 477 North Mathilda Ave., Sunnyvale, Calif. 94086; (408) 523-9200.

The PI logo and TOPSwitch are registered trademarks of Power Integrations, Inc.

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