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MOSFET series extends package footprint options

Posted: 01 Dec 2011     Print Version  Bookmark and Share

Keywords:power MOSFET  DC/DC converter  asymmetric power 

Vishay Intertechnology Inc. expands its PowerPAIR family of dual asymmetric power MOSFETs for low-voltage DC/DC converter applications. The devices in Siliconix PowerPAIR family claim to help simplify the design of highly efficient synchronous buck single and multi-phase DC/DC converters by providing an optimised combination of two MOSFETs in a single package.

The devices increase the series' voltage and package footprint options with 3x3mm, 6x3.7mm and 6x5mm PowerPAIR form factors.

The 30V SiZ300DT comes in the PowerPAIR 3x3mm and the SiZ910DT in the PowerPAIR 6x5mm. The SiZ300DT targets DC/DC applications handling currents of 10A and under, while the SiZ910DT is said to be suitable for applications above 20A. The PowerPAIR 3x3mm has approximately one third the area of the PowerPAIR 6x5mm.

The company claims that the three new devices in the PowerPAIR 6x3.7mm are all industry firsts, and with the previously released SiZ710DT expand the voltage range in this form factor from 20V up to 30V. The SiZ728DT is a 25V PowerPAIR that comes in a 6x3.7mm device, while the SiZ790DT is the first device in this form factor with an on-board Schottky diode, Vishay said. The SiZ730DT is debuting as the lowest-RDS(on) 30V PowerPAIR 6x3.7mm device.

The devices' asymmetric configuration improves performance by allowing the size of the low-side MOSFET to be increased for lower conduction losses. The combination of TrenchFET Gen III technology and the asymmetric nature of PowerPAIR allow Vishay to achieve a maximum on-resistance down to 3mΩ for the low-side synchronous MOSFET, almost 50 per cent lower than in a comparable symmetrical device.

By giving designers two co-packaged MOSFETs, PowerPAIR devices simplify PCB layouts and reduce parasitic inductance, which can help to reduce switching losses and improve efficiency.

The PowerPAIR devices will help to promote more efficient use of power and space in a wide range of electronics, including notebook and desktop computers, servers, game consoles, set-top boxes, TV monitors, and modems.

Samples and production quantities of the new PowerPAIR devices are available now, with lead times of 12 to 14 weeks for large orders.

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