Monolithic Power Systems Files Patent Infringement Lawsuit Against Chip Advanced Technology

SAN JOSE, Calif. December 12, 2007 -- Monolithic Power Systems (MPS) (Nasdaq: MPWR), a leading fabless manufacturer of high-performance analog and mixed-signal semiconductors, announced today it has filed a patent infringement lawsuit with the U.S. District Court for the Central District of California against Chip Advanced Technology Inc. (CAT) asserting that CAT has willfully infringed an MPS patent that enables efficient low-voltage, low-current power conversions, such as DC-DC step-down converters. In the complaint, MPS seeks unspecified damages and a court-ordered injunction against future infringement by CAT. Through this lawsuit, MPS intends to vigorously protect and enforce its intellectual property.

About Monolithic Power Systems
Monolithic Power Systems, Inc. (MPS) develops and markets proprietary, advanced analog and mixed-signal semiconductors. The company combines advanced process technology with its highly experienced analog designers to produce high-performance power management integrated circuits (ICs) for DC to DC converters, LED drivers, Cold Cathode Fluorescent Lamp (CCFL) backlight controllers, Class D audio amplifiers, and Linear ICs. MPS products are used extensively in computing and network communications products, LCD monitors and TVs, and a wide variety of consumer and portable electronics products. MPS partners with world-class manufacturing organizations to deliver top quality, ultra-compact, high-performance solutions through the most productive, cost-efficient channels. Founded in 1997 and headquartered in San Jose, California, the company has expanded its global presence with sales offices in Taiwan, China, Korea, Japan, and Europe, which operate under MPS International, Ltd.

###

Monolithic Power Systems, MPS, and the MPS logo are registered trademarks of Monolithic Power Systems, Inc. in the U.S. and trademarked in certain other countries.