Power Integrations Included in New Clean-Energy Stock Index

May 31, 2006
Company's Technology Dramatically Cuts Standby Power Losses in Electronic Products

SAN JOSE, Calif.--(BUSINESS WIRE)--May 31, 2006--Power Integrations (Nasdaq: POWI) , the leader in high-voltage analog integrated circuits for power conversion and the inventor of EcoSmart® energy-efficiency technology, today announced its membership in a new NASDAQ stock index tracking the performance of clean-energy companies. The NASDAQ Clean Edge U.S. Index includes companies engaged in the manufacture, development, distribution and installation of clean-energy technologies. NASDAQ launched the index on May 18 under the symbols CLEN and CLNX.

Power Integrations' integrated circuits (ICs) with EcoSmart technology reduce energy waste in products such as computer and A/V equipment, home appliances, cellphone chargers and other AC adapters. The company's ICs are used in power supplies, which convert high-voltage AC power from a wall outlet into the low-voltage DC power needed by most electronic products. EcoSmart technology intelligently manages the flow of power through the power supply, reducing energy consumption during normal operation and cutting standby losses by up to 97 percent. Standby losses, the power consumed while an electronic product is plugged into a wall outlet but not in use, have been estimated to account for up to 10 percent of residential electricity consumption.

Since 1998, Power Integrations has sold more than 1.1 billion chips with EcoSmart technology. As a result, consumers and businesses have saved more than an estimated $1.6 billion on their electricity bills, and approximately 10 million tons of carbon dioxide emissions have been averted.

"In order to protect our natural resources in this time of exploding demand for energy, the world must seek ways to generate more clean energy while also embracing technologies that help slow the growth in energy consumption," said Balu Balakrishnan, president and CEO of Power Integrations. "Our inclusion in the NASDAQ Clean Edge U.S. Index is a strong acknowledgement of Power Integrations' role in addressing the global energy crisis."

Power Integrations is also a member of the WilderHill Clean Energy Index, the WilderHill New Energy Global Innovation Index, and the Distributed Energy Stock Index. The company has twice been named one of the world's top 20 sustainable stocks by SustainableBusiness.com.

About Power Integrations

Power Integrations, Inc. is the leading supplier of high-voltage analog integrated circuits used in power conversion. The company's breakthrough technology enables compact, energy-efficient power supplies in a wide range of electronic products, in both AC-DC and DC-DC applications. The company's EcoSmart energy-efficiency technology, which dramatically reduces energy waste, has saved consumers and businesses around the world more than an estimated $1.6 billion on their electricity bills since its introduction in 1998. For more information, visit the company's website at www.powerint.com. For information on global energy-efficiency standards and EcoSmart solutions, visit the Power Integrations Green Room at www.powerint.com/greenroom.
NASDAQ: POWI $117.24 -0.38
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