Vishay's New 20-V V_DS/20-V V_GS MOSFETs Provide On-Resistance Down to 3.2 mΩ for Efficient Desktop and Server Core DC-to-DC Converters

SANTA CLARA, CALIFORNIA — July 16, 2003 — Siliconix incorporated (NASDAQ: SILI), an 80.4%-owned subsidiary of Vishay Intertechnology (NYSE: VSH), today announced 12 new 20-V V_DS/20-V V_GS power MOSFETs in the thermally enhanced PowerPAK® and D²PAK and conventional DPAK packages.

The new devices offer the industry's lowest on-resistance and the lowest on-resistance-times-gate-charge product of any 20-V V_DS/20-V V_GS thermally enhanced power MOSFETs.

Supply output current for CPU systems is increasing rapidly while voltage regulation across the CPU is decreasing. With low on-resistance and gate charge values, these new devices from Vishay Siliconix minimize conduction and switching losses for increased efficiency in 20-V server and desktop core dc-to-dc conversion applications. The devices' 20-V V_DS/20-V V_GS rating also serves to provide additional headroom in 12-V systems.

Thanks to advanced packaging techniques, these new devices can handle up to 70 A in the DPAK and 110 A in the D²PAK, which extends their application beyond servers and computers to automotive systems.

Vishay's SUM110N02-03P D²PAK leads the next-best device on the market with 20% lower on-resistance of 3.2 mΩ at 10 V, while the SUM40N02-12P provides the lowest r_DS(on) x Q_g product in the 20-V V_DS/20-V V_GS class of devices, just 90.

For DPAK-packaged devices, the new SUD70N02-04P offers 25% lower on-resistance than any competing device, with a maximum rating of just 3.7 mΩ. The SUD50N02-12P, meanwhile, provides the lowest r_DS(on) x Q_g product — just 90 — among 20-V V_DS/20-V V_GS DPAK devices. This figure of 90 is among the lowest on the market even when compared with devices in the 25-V V_DS/20-V V_GS range.

All of the devices announced today intended for low-side applications are optimized with a Q_GD/Q_GS ratio of less than 1 to help prevent the MOSFET from going into a "shoot-thru" situation during which both the high and low side are on, creating a short from the input voltage to ground.

Samples and production quantities of the new power MOSFET devices are available now with lead times of 8 to 10 weeks for larger orders.

Siliconix is a leading manufacturer of power MOSFETs, power ICs, analog switches and multiplexers for computers, cell phones, fixed communications networks, automobiles, and other consumer and industrial electronic systems. With 2002 worldwide sales of $372.9 million, the Company's facilities include a Class 1, wafer fab dedicated to the manufacture of power products in Santa Clara, California, and an affiliated Class 1, wafer fab located in Itzehoe, Germany. The Company's products are also fabricated by subcontractors in Japan, Germany, China, and Taiwan. Assembly and test facilities include a company-owned facility in Taiwan, a joint venture in Shanghai, China, and subcontractors in the Philippines, China, Taiwan, Israel, and the United States.

Vishay Intertechnology, Inc., a Fortune 1,000 Company listed on the NYSE (VSH), is one of the world's largest manufacturers of discrete semiconductors (diodes, rectifiers, transistors, and optoelectronics and selected ICs) and passive electronic components (resistors, capacitors, inductors, sensors, and transducers). These components are used in virtually all types of electronic devices and equipment, in the industrial, computing, automotive, consumer, telecommunications, military, aerospace, and medical markets. Its product innovations, successful acquisition strategy, and ability to provide "one-stop shop" service have made Vishay a global industry leader. Vishay can be found on the Internet at http://www.vishay.com.

PowerPAK is a registered trademark of Siliconix incorporated.