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Media contact -  Bob Decker, Redpines
Phone:  1.415.409.0233 
Fax:  1.650.618.1512 
E-mail:  bob.decker@redpinesgroup.com

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


For more information:
Media contact -  Bob Decker, Redpines
Phone:  1.415.409.0233 
Fax:  1.650.618.1512 
E-mail:  bob.decker@redpinesgroup.com

Sales contact: 

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 VDS/20-V VGS 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 VDS/20-V VGS 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 VDS/20-V VGS 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 rDS(on) x Qg product in the 20-V VDS/20-V VGS 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 rDS(on) x Qg product — just 90 — among 20-V VDS/20-V VGS DPAK devices. This figure of 90 is among the lowest on the market even when compared with devices in the 25-V VDS/20-V VGS range.

All of the devices announced today intended for low-side applications are optimized with a QGD/QGS 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.

Package Type Device rDS(on) (Ω at 4.5 V) Qg (nC at 4.5 V) rDS(on) x Qg QGS (nC) QGD (nC)

D2PAK (TO-263)

SUM110N02-03P 0.0052 40 208 14 13

D2PAK (TO-263)

SUM85N02-05P 0.0083 19 158 7.5 6

D2PAK (TO-263)

SUM40N02-09P 0.017 10.5 179 4.2 4

D2PAK (TO-263)

SUM40N02-12P 0.026 7.5 195 3.5 2.6

DPAK (TO-252)

SUD70N02-04P 0.0061 34 207 11 10

DPAK (TO-252)

SUD70N02-05P 0.0083 19 158 7.5 6

DPAK (TO-252)

SUD50N02-06P 0.0095 19 181 7.5 6

DPAK (TO-252)

SUD50N02-09P 0.017 10.5 179 4.2 4

DPAK (TO-252)

SUD50N02-11P 0.02 9.2 184 4 3

DPAK (TO-252)

SUD50N02-12P 0.026 7.5 195 3.5 2.6
PowerPAK Si7344 DP 0.012 10 120 3.3 3.1
PowerPAK Si7348DP 0.020 5.7 114 2.2 2.0

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 1000 Company listed on the NYSE (VSH), is one of the world's largest manufacturers of discrete semiconductors (diodes, MOSFETs, and infrared optoelectronics) and passive electronic components (resistors, inductors, and capacitors). These components are used in virtually all types of electronic devices and equipment, in the industrial, computing, automotive, consumer, telecommunications, military, aerospace, power supplies, and medical markets. Vishay’s product innovations, successful acquisition strategy, and "one-stop shop" service have made it a global industry leader. Vishay can be found on the Internet at www.vishay.com.

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PowerPAK is a registered trademark of Siliconix incorporated.

For more information:
Media contact -  Bob Decker, Redpines
Phone:  1.415.409.0233 
Fax:  1.650.618.1512 
E-mail:  bob.decker@redpinesgroup.com

Sales contact: