SMT, PCB Electronics Industry News

SMT, PCB Electronics Industry News

News from Vishay Intertechnology, Inc.

Vishay Siliconix Announces New PolarPAK Double-Sided Cooling MOSFETs

Dec 15, 2005

Vishay Intertechnology, Inc. today announced that it is shipping the first two power MOSFETs to be offered in its innovative PolarPAK package, which uses double-sided cooling to reduce thermal resistance, package resistance, and package inductance for a more efficient, faster-switching power MOSFET.

PolarPAK was specifically designed for easy handling and mounting onto the PCB with high-speed assembly equipment, thus enabling high assembly yields in mass-volume production. This is one reason why PolarPAK has already earned the distinction of being the first MOSFET package with double-sided cooling to be sourced by multiple manufacturers, beginning with a license agreement concluded between Vishay and STMicroelectronics in March 2005.

The first PolarPAK power MOSFETs are the 30-V n-channel SiE802DF and SiE800DF. Optimized for the low-side control switch in synchronous rectification dc-to-dc converters, the SiE802DF offers exceptionally low on-resistance of 1.9 milliohms maximum at a 10-V gate drive (2.6 milliohms maximum at 4.5 V) and can handle current levels up to 60 A. The SiE800DF, optimized to work as the low-duty-cycle high-side MOSFET in synchronous dc-to-dc converter designs, features a very low typical gate charge Qg of 12 nC, with on-resistance of 7.2 milliohms maximum at 10 V and 11.5 milliohms at 4.5 V.

The new PolarPAK power MOSFETs, which have the same footprint dimensions of the standard SO-8, dissipate 1 degree Celsius per Watt from their top surface and 1 degree Celsius per Watt from their bottom surface. This provides a dual heat dissipation path that gives the devices twice the current density of the standard SO-8. With its improved junction-to-ambient thermal impedance, a PolarPAK power MOSFET can either handle more power or operate with a lower junction temperature. A lower junction temperature means a lower rDS(on), which in turn means higher efficiency. A reduction in junction temperature of just 20 degrees Celsius can also result in a 2-1/2 times increase in lifetime reliability.

Typical applications for the new PolarPAK devices include voltage regulator modules in notebook and desktop PCs, and other systems requiring high-efficiency dc-to-dc conversion. By delivering superior thermal performance and reducing package-related losses, the 5-mm by 6-mm PolarPAK package allows designers to create smaller, more compact circuit designs with a lower component count. With a height dimension of just 0.8 mm, half the height of the SO-8, the PolarPAK package enables end products that are thinner as well.

Samples and production quantities of the SiE800DF and SiE802DF are available now, with lead times of 10 to 12 weeks for larger orders. Pricing in 10,000-piece quantities starts at $1.00 per piece for the SiE802DF and $0.80 per piece for the SiE800DF.

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

PolarPAK is a registered trademark of Siliconix incorporated

Editor resources:

Links to product datasheets: (SiE800DF) (SiE802DF)

Link to product photo:

Editorial contact:

Bob Decker, Wall Street Communications (+1 415 409-0233,

Reader contact:



Phone (samples): 1 619 336-0860

You must be a registered user to talk back to us.

More News from Vishay Intertechnology, Inc.

Jul 06, 2010 -

Vishay's New Mid-Range IR Sensors Feature Digital or Analog Output With Industry-Best Response Time of 300 Microseconds in Three Package Types

Feb 14, 2007 -

Vishay�s New VJ HVArc Guard� Surface-Mount C0G MLCCs Are Industry�s First Designed to Prevent Surface Arc-Over at High Voltages With Capacitance Ranges of 10 pF to 2700 pF

Feb 14, 2007 -

Vishay Offers Designers Free Online MOSFET Thermal-Simulation Tool

Feb 24, 2006 -

New Vishay Siliconix Boost Converter ICs Provide 85 % Efficiency at 500 mA Down to 1 mA From Battery Voltages as Low as 0.85 V

Feb 24, 2006 -

Vishay Siliconix Announces High-Speed Integrated MOSFET+Drivers

Feb 24, 2006 -

New Trio of Precision Low-Voltage Vishay Siliconix Analog Switching ICs

Dec 15, 2005 -

Vishay Siliconix Announces New PolarPAK Double-Sided Cooling MOSFETs

Dec 06, 2005 -

New Vishay Siliconix Slew-Rate-Controlled 1-A Load Switches

Dec 06, 2005 -

Vishay's New Dual-Output LDO Regulators With 48-Microamp Ground Current Convert 2.25-V to 5.5-V Inputs to Outputs as Low as 1.5 V at Current Levels of 150 mA and 300 mA

Nov 29, 2005 -

Vishay Siliconix Announces Two New 10-A Synchronous Buck Controller ICs

(15) more news from Vishay Intertechnology, Inc.

Vishay Siliconix Announces New PolarPAK Double-Sided Cooling MOSFETs news release has been viewed 1315 times

SMT Equipment Service