30V symmetric dual MOSFETs save space in in PowerPair 3x3FS package
Two space saving MOSFETs by Vishay Intertechnology also reduce component count and simplify designs in power conversion for computing and telecomms applications.
The Vishay Siliconix SiZF5300DT and SiZF5302DT achieve 98 per cent efficiency while requiring 63 per cent less PCB space than the PowerPair 6x5F package. The 30V symmetric dual n-channel power MOSFETs combine high and low side TrenchFET Gen V MOSFETs in a single 3.3 x 3.3mm PowerPair 3x3FS package.
The SiZF5300DT and SiZF5302DT dual MOSFETs can be used in place of two discrete devices in the PowerPak 1212 package — saving 50 per cent board space, added Vishay. They therefore save space in synchronous buck converters, point of load (PoL) conversion, and DC/DC modules in laptops with USB-C power delivery, servers, DC cooling fans, and telecomms equipment. In these applications, the high and low side MOSFETs of the SiZF5302DT are optimised for 50 per cent duty cycles and best in class efficiency, in particular from 1.0 to 4.0A. The SiZF5300DT provides an optimised combination for heavy loads in the 12 to 15A range, added Vishay.
Both devices are based on Vishay’s 30V Gen V technology for optimal on-resistance and gate charge. The SiZF5300DT provides typical on-resistance of 2.02 mOhm at 10V and 2.93 mOhm at 4.5V, while the SiZF5302DT features on-resistance of 2.7 mOhm at 10V and 4.4 mOhm at 4.5V. Typical gate charge for the MOSFETs at 4.5V is 9.5 nC (SiZF5300DT) and 6.7 nC (SiZF5302DT). The resulting low on-resistance times gate charge, a key figure of merit (FOM) for MOSFETs used in power conversion applications, pointed out Vishay, is 35 per cent lower than that of previous-generation devices with similar on-resistance. For high frequency switching applications, the result is a two per cent increase in efficiency, allowing for efficiency of 98 per cent at 100W.
The devices’ flip-chip technology is claimed to enhance thermal dissipation, while the pin configuration enables a simplified PCB layout and supports shortened switching loops to minimise parasitic inductance.
The SiZF5300DT and SiZF5302DT are 100 per cent Rg- and UIS-tested, RoHS-compliant, and halogen-free.
Samples and production quantities of the SiZF5300DT and SiZF5302DT are available now.
