Linear Technology’s LTC4449 synchronous mosfet driver designed to drive upper and lower power N-channel mosfets in a synchronous rectified converter topology.

The device drives both upper and lower mosfet gates over a range of 4V to 6.5V and operates from a supply voltage up to 38V.

It can sink up to 4.5A and source up to 3.2A, making it suitable for driving high gate capacitance and high current devices. It can also drive multiple mosfets in parallel for higher current applications.

It has 8ns rise time, 7ns fall time of the top mosfet and 7ns rise time, 4ns fall time of the bottom mosfet when driving a 3,000pF load.

The device features a 3-state pulse with modulation (PWM) input for power stage control and shutdown that is compatible with all multiphase controllers employing a 3-state output feature.

For more information, see http://www.linear.com