200-V LITTLE FOOT® Power MOSFETs in TSOP-6 and SOT-23 Feature Reduced Gate Charge, Record-Low On-Resistance For Telecom DC/DC Conversion Applications

MALVERN, PENNSYLVANIA - January 14, 2000 - Vishay Intertechnology, Inc. (NYSE: VSH), today announced that it is sampling two new record-breaking 200-V power MOSFETs in the LITTLE FOOT TSOP-6 and SOT-23 packages. The new devices are optimized for dc-to-dc power conversion applications in ISDN terminals, commercial phone sets, line cards, and other low power communication devices, where their reduced gate charge characteristics and low on-resistance ensure efficient handling of standard -48-V telecom voltages.

Released today were the Vishay Siliconix Si3420DV (TSOP-6) and Si2320DS (SOT-23). On-resistance for the TSOP-6 device is 3.7 ohms at a 10-V gate drive with typical gate charge of just 2.2 nC. Comparable specifications for the SOT-23 device are 7 ohms on-resistance and 1.1 nC. The TSOP-6 Si3420DV handles up to 0.5 A, while the Si2320DS handles up to 0.28 A.

"Switching losses are as significant as conduction losses in -48-V telecom power conversion applications, so we've optimized these new devices accordingly, with a low gate charge level," said Tony Grizelj, Market Development Manager at Vishay Intertechnology. "As such, they will work with maximum efficiency in end products such as ISDN terminals and other applications for the communications infrastructure, where the input current to a dc-to-dc converter is around 100 mA."

In addition to the Si3420DV and S2320DS, Vishay is introducing a second 200-V device in the TSOP-6 for highly cost-sensitive designs. The new Si3422DV features on-resistance of 5 ohms and typical gate charge of 2.1 nC.

Samples and production quantities of all three new 200-V devices are available now, with lead times of 8 to 10 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.