The MOSFETs’ compact outlines save PCB space and provide ultra-thin profiles to enable slimmer and lighter portable electronics, while their low on-resistance translates into lower conduction losses for reduced power consumption and longer battery life between charges. The devices’ low on-resistance also means a lower voltage drop across the load switch to prevent unwanted under-voltage lockout.
For the first time in this form factor, the MOSFETs are built on an ultra-high-density technology, which uses self-aligning process techniques to pack one billion transistor cells into each square inch of silicon. When combined with MICRO FOOT’s packageless CSP technology, this provides the lowest on-resistance possible for a given outline area.
For n-channel devices, the result is a 43 mΩ maximum on-resistance at a 4.5 V gate drive for the 12 V Si8806DB. When a 20 V rating is needed, the Si8812DB offers a maximum on-resistance of 59 mΩ. The n-channel devices are optimal for high-speed switching applications with fast turn-on/off times of < 100 ns, such as DC/DC boost converter applications.
The -20 V p-channel Si8817DB and Si8489EDB are optimized for buck converter applications. With 76 mΩ maximum on-resistance at a 4.5 V gate drive, the smaller 0.8 mm by 0.8 by 0.4 mm Si8817DB will be used for applications where space is even more critical than on-resistance. The 1 mm by 1 mm Si8489EDB will be used when the lower maximum on-resistance of 54 mΩ at 4.5 V is more critical.
The Si8489EDB is the first p-channel Gen III device in the 1 mm by 1 mm form factor, and provides 2500 V typical ESD protection. In addition, the Si8817DB offers on-resistance ratings down to 1.5 V, allowing the device to work with the lower-voltage gate drives and lower bus voltages common in handheld devices, saving the space and cost of level-shifting circuitry.
The devices are compliant to RoHS Directive 2011/65/EU and halogen-free according to the JEDEC JS709A definition.
The Si8806DB, Si8812DB, Si8817DB and Si8489EDB are the latest expansion to the MICRO FOOT family.
Device Specification Table:
