Seven power MOSFETs in the new PowerPAK SO-8 family were announced by Siliconix, a subsidiary of Vishay Intertechnology. Designed for DC-to-DC converter applications, the new Vishay Siliconix devices will be used in desktop PCs, notebooks, laptops, servers, routers, and networking systems, as well as in standalone converter modules. With good current and power dissipation capabilities, and a thinner profile than standard SO-8 MOSFETs, these new PowerPAK devices may be used in many applications to replace DPAK power MOSFETs with a device requiring half as much space on the PCB.
The Si7440DP, Si7446DP, and Si7840DP are single n-channel 30 V fast-switching MOSFETs designed to serve in synchronous buck DC-to-DC converters for computing applications. The Si7440DP is optimized for low-side synchronous rectifier operation with the lowest on-resistance of the three devices, just 6.5 mΩ at a 10 V gate drive, and a typical gate charge value of 29 nC. The Si7446DP features on-resistance of 7.5 mΩ at a 10 V gate drive and a typical gate charge value of 36 nC. Optimized for high-side operation, the Si7840DP features comparable specifications of 9.5 mΩ and 35 nC.