Malvern, Pa. — Vishay Intertechnology, Inc. has unveiled a 30-V asymmetric dual TrenchFET power MOSFET in the PowerPAIR 3 x 3-mm package that delivers 57 percent lower on-resistance, up to 25 percent higher power density, and 5 percent higher efficiency than previous-generation devices in this package size. The Vishay Siliconix SiZ340DT helps to save space and simplify the design of highly efficient synchronous buck converters by combining a high-side and low-side MOSFET in one compact package, said Vishay.
The TrenchFET Gen IV technology of the SiZ340DT uses a very high-density design to reduce on-resistance without significantly increasing the gate charge, which minimizes conduction losses and reduces total power loss for higher power output, said Vishay. As a result, the low-side Channel 2 MOSFET offers a low on-resistance of 5.1 mΩ at a 10 V gate drive and 7.0 mΩ at 4.5 V, while the high-side Channel 1 MOSFET features on-resistance of 9.5 mΩ at 10 V and 13.7 mΩ at 4.5 V.
The new device targets synchronous buck designs in "cloud computing" infrastructures, servers, telecommunication equipment, and various client-side electronic devices and mobile computing applications. In these applications, the device maintains a low gate charge of 5.6 nC for the Channel 1 MOSFET and 10.1 nC for Channel 2, which reduces conduction and switching losses to improve total system efficiency, said Vishay. This higher efficiency is said to allow the SiZ340DT to run 30 percent cooler than previous-generation devices at the same output load, or to provide increased power density.
For typical DC/DC topologies with 10 A to 15 A output current and an output voltage below 2 V, the small package size saves up to 77 percent PCB space compared with using discrete solutions, such as a PowerPAK 1212-8 MOSFET for the high-side and a PowerPAK SO-8 for the low side. In addition, the device allows higher switching frequencies beyond 450 kHz to shrink the PCB size, without sacrificing efficiency, by enabling the use of smaller inductors and capacitors.
The SiZ340DT is 100 percent Rg- and UIS-tested, halogen-free according to the JEDEC JS709A definition, and compliant to RoHS Directive 2011/65/EU.
Availability: Samples and production quantities are available now, with lead times of 14 to 16 weeks for large orders.
Pricing: Starts at $0.32 per piece in quantities of 10,000 for U.S. delivery only.