This powerful driver can source up to 2.5A with a 1.2 Ohm pull-down impedance for driving the top MOSFET and can source 3A with a 0.55 Ohm pull-down impedance for the synchronous MOSFET, making it ideal for driving high gate capacitance, high current MOSFETs. The LTC4446 can also drive multiple MOSFETs in parallel for higher current applications. The fast 8ns rise time, 5ns fall time of the top MOSFET, and 6ns rise time, 3ns fall time of the bottom MOSFET when driving a 1,000pF load minimize switching losses.
The LTC4446 is configured for two supply-independent inputs. The high-side input logic signal is internally level-shifted to the bootstrap supply, which may function at up to 114V above ground. Furthermore, this part drives both upper and lower MOSFET gates over a range of 7.2V to 13.5V.