Siliconix has released a trio of 250 V n-channel TrenchFET power MOSFETs that are claimed to offer the lowest on-resistance available in the SO-8, PowerPAK SO-8, and D2PAK packages for this voltage rating.
The Si4434DY (Little Foot SO-8), Si7434DP (PowerPAK SO-8), and SUM45N25-58 (D2PAK) are designed to serve as primary switches in DC-to-DC converters, including forward converters and half-bridge converters, as well as in AC-to-DC converters and inverters, for telecom power supplies, distributed architectures, and miniature power modules.
The devices offer improved on-resistance values compared with other devices of the same size. The Si4434DY and Si7434DP both feature a maximum on-resistance value of 155 milliohm at a 10 V gate drive and typical gate charge value of 34 nC.
In the low-thermal-resistance D2PAK package, the SUM45N25-58 features on-resistance on 58 milliohm, a gate charge value of 95 nC and a maximum junction temperature rating of 175°C.
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