New Vishay Siliconix -150-V and -200-V P-Channel Power MOSFETs Save Space for Active Clamp Configurations

Offer On-Resistance Down to 1.2 Ω in SC-70 and SOT-23 Packages

SANTA CLARA, CALIFORNIA — April 27, 2005 — A family of new -150-V and 200 V p channel power MOSFETs that offers space-saving solutions for active clamp configurations were released today by Siliconix incorporated (NASDAQ: SILI), an 80.4%-owned subsidiary of Vishay Intertechnology, Inc. (NYSE: VSH).

While p-channel MOSFETs for active clamps offer a simpler alternative to n-channel clamp implementations, until now the majority of devices suitable for this application were available only in larger packages such as the SO-8 and DPAK. With the new devices in the SOT-23 and SC-70, Siliconix brings together small size and on-resistance values at least 80% better than the nearest competing devices.

Built on Siliconix's advanced p channel TrenchFET® technology, the compact dimensions of these new p channel power MOSFETs reduce board space requirements to enable smaller overall product design without sacrificing performance. Because p channel drive circuitry is less complicated than that of n-channel solutions, these new devices also allow designers to implement smaller, lower-cost active clamp designs in small and intermediate-sized power converters.

The power MOSFETs released today are intended for primary-side active clamp circuits in dc-to-dc converters for telecom, datacom, and industrial products. With on-resistance values ranging from 1.2 ohms to 2.35 ohms, these power MOSFETs represent industry-best on-resistance for their respective footprints.

In addition to these devices in the SC-70 and SOT-23, Siliconix is releasing two PowerPAK SO-8 devices for the same application. The -150-V Si7439DP offers on-resistance of 0.09 milliohms, while the -200-V Si7431DP is rated for 0.174 milliohms.

Samples and production quantities of the new devices are available now, with lead times of 12 weeks for larger orders.

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.