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New Vishay Siliconix -150-V and -200-V P-Channel MOSFETs Save Space for Active Clamp Configurations
Offer On-Resistance Down to 1.2 Ohms in SC-70 and SOT-23 Packages


A family of new -150-V and -200-V p-channel power MOSFETs that offers space-saving solutions for active clamp configurations was 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. Pricing for U.S. delivery in 100,000-piece quantities starts at $0.20.

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 2004 worldwide sales of $466.1 million, the company's facilities include a company-owned Class 1 wafer fab dedicated to the manufacture of power products in Santa Clara, Calif., and a Class 1 wafer fab located in Itzehoe, Germany utilized under a lease arrangement. The company's products are also fabricated by subcontractors in Japan, Germany, China, Taiwan, and the United States. Assembly and test facilities include a company-owned facility in Taiwan, a joint venture in Shanghai, China, and subcontractors in the Philippines, China, Taiwan, and Israel.

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, and transducers). Vishay's components can be found in products manufactured in a very broad range of industries worldwide. Vishay is headquartered in Malvern, Pa., and has operations in 17 countries employing over 25,000 people. Vishay can be found on the Internet at http://www.vishay.com.

TrenchFET and PowerPAK are registered trademarks of Siliconix incorporated.

Editorial contact:
Bob Decker, Wall Street Communications (+1 415 409 0233, bob.decker@wallstcom.com)

Worldwide reader contacts:
E-mail: info@vishay.com
Web: www.vishay.com
Phone (samples): 1 619 336-0860


Publisher Contact Information:

Vishay Siliconix
1-775-626-7722
rae@wallstreetcom.tv

Company profile of Vishay Siliconix
Past press releases of Vishay Siliconix.

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