10 X 12mm maXyz POL Converter Provides 15 Amps.

Business Editors/High-Tech Writers

CAMARILLO, Calif.--(BUSINESS WIRE)--April 24, 2003

Power-One, Inc. (Nasdaq:PWER) announces the X3015P, the first product in the new maXyz(TM) family of DC/DC converters. The product has already been sampled to beta-site customers and will be available for general sampling after beta trials are complete. This exceptionally small device utilizes a semiconductor LGA package and is ideal for powering Intermediate Bus Architecture (IBA) Point-Of-Load (POL) applications.

This non-isolated POL converter integrates 22 power semiconductor and layout-critical passive components to provide 15 amps of output current from a 10 x 12mm footprint. An ultra-low-profile 1.5mm height allows mounting on the bottom side of a host printed circuit board, further reducing critical-space consumption on the top side of the board. Other industry-leading features include:

-- Wide input voltage range (3.0 to 6.0VDC) and programmable

output (0.75 to 4.0VDC) permit the use of just one part for a

variety of applications

-- Current density of over 80 amps/square inch (over 12

amps/cm(2)) dramatically reduces PCB area occupied by discrete

solutions and other POL regulators

-- Minimal external component requirements provide a parts

reduction of over 90% when compared to discrete solutions

-- Programmable fixed frequency, 300-500 kHz, allows optimization

of POL designs for the smallest size, lowest cost, and highest

efficiency

-- Industry's first POL converter of this type approved by UL

Steve Goldman, Chairman and CEO, commented, "The X3015P is a significant strategic shift for us that involves development of an advanced-technology power conversion product utilizing a fabless semiconductor business model. Power-One's strong balance sheet and in-depth understanding of customers' applications uniquely position us to pursue this aggressive strategy to broaden our available market with intellectual property rich products such as the maXyz(TM) family."

Please visit www.power-one.com to download an X3015P product brief and to register for a detailed data sheet and future product updates. A prototype design qualification kit that includes an X3015P mounted on an evaluation board ready to test is being offered to selected customers during the beta-testing phase. Production availability of both the X3015P and the design kit are currently scheduled for the July 2003 timeframe.

Power-One is one of the largest manufacturers of power conversion products in the world and is listed in the S&P 500. Products are sold to telecommunications and Internet service providers and equipment manufacturers. Power-One, with headquarters in Camarillo, Calif., has global sales offices and manufacturing and R&D operations in China, Dominican Republic, Ireland, Norway, Slovakia, Switzerland, and the United States.

This press release contains forward-looking statements, which are made pursuant to the Safe-Harbor provisions of the Private Securities Litigation Reform Act of 1995. Words such as "expect", "anticipate", and similar expressions reflecting something other than historical fact are intended to identify forward-looking statements, but are not the exclusive means of identifying such statements. Future results may be adversely affected by various factors including the pace and market acceptance of new product offerings of the Company; the Company's ability to manage transitions into new areas of technologies, engineering, and manufacturing methods; the Company's ability to secure intellectual property rights claimed for applicable inventions, and ongoing pervasive weakness throughout the communications industry. See "Risk Factors" in the Company's 2002 Form 10-K on file with the Securities and Exchange Commission for greater detail regarding factors that constitute cautionary statements with respect to such forward-looking statements, including certain risks and uncertainties that could cause actual results to differ materially from those in such forward-looking statements. The Company undertakes no obligations to revise or update any forward-looking statements in order to reflect events or circumstances that may arise after the date of this release.