MOSFET Driver from Linear Technology

This powerful driver can sink up to 5A and source up to 2.4A, making it ideally suited for driving high gate capacitance, high current MOSFETs. The LTC4443/-1 can also drive multiple MOSFETs in parallel for higher current applications. The fast 12nS rise time and 8nS fall time when driving a 3,000 pF load, minimize switching losses. Adaptive shoot-through protection is integrated to prevent both the upper and lower MOSFETs from conducting simultaneously and to minimize dead time. An integrated bootstrap schottky diode is incorporated which simplifies the circuit.

The LTC4443/-1 has a 3-state PWM input for power stage shut-down that is compatible with all multi-phase controllers employing a 3-state output feature. In addition, it has a separate supply for the input logic to match the signal swing of the controller IC and has an undervoltage lockout circuit on both the driver and logic supplies. Furthermore, this part drives both upper and lower MOSFET gates over a range of 6V to 9.5V and operates up to a 38V supply voltage. The -1 version has a higher VCC undervoltage lockout of 6.2V instead of 3.2V, intended to drive standard 5V logic N-Channel MOSFETs.