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MOSFETs claim lowest on-resistance

Posted: 24 Dec 2008     Print Version  Bookmark and Share

Keywords:power MOSFETs  gate source voltage  on-resistance  SO-8 footprint 

TrenchFET power MOSFETs

Vishay Intertechnology Inc. has announced the availability of 20- and 30V p-channel TrenchFET power MOSFETs with ±:20V gate source voltage, claimed to offer lowest on-resistance for their device types in the SO-8 footprint.

While the available competing devices with these voltage ratings in the SO-8 footprint offer on-resistance only down to 24m#8486:, the Si7633DP offers an ultra low on-resistance of 3.3m#8486; at 10V and 5.5m#8486; at 4.5V. These values are 27 per cent lower at 10V, and 28 per cent lower at 4.5V than the closest competing 30V device, and 28 per cent and 15 per cent lower, respectively, than the closest competing 25V SO-8 device. The 30V Si7135DP offers an on-resistance of 3.9m#8486; at 10V and 6.2m#8486; at 4.5V. These values are 13 per cent lower at 10 V, and 19.5 per cent lower at 4.5V than the closest competing device.

Packaged in the PowerPAK SO-8, both MOSFETs allow for a 60 per cent higher maximum drain current and 75 per cent higher maximum power dissipation than devices in the SO-8 package.

The devices are designed to be used as the adaptor switch and for load switching applications in notebook computers and industrial/general systems. Adaptor switches (switching between the adaptor/wall power and the battery power) are always on and drawing current. The lower on-resistance of the Si7135DP and Si7633DP translates into lower power consumption, saving power and prolonging battery life between charges.

Vishay has also released the Si4459ADY 30V p-channel TrenchFET power MOSFET in the SO-8 package. The device offers an on-resistance of 5m#8486; at 10 V and 7.75m#8486; at 4.5 V. All devices released today are 100 per cent Rg- and UIS-tested and halogen-free.

Samples and production quantities of the new Si7135DP and Si7633DP TrenchFET power MOSFETs are available now, with lead times of 10 to 12 weeks for larger orders.

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