The LTC4447 drives both upper and lower MOSFET gates from rail-to-rail over a voltage range of 4V to 6.5V and operates from a supply voltage up to 38V. This powerful driver can sink up to 5A and source up to 3.2A, making it ideal for driving high gate capacitance, high current MOSFETs. The LTC4447 can also drive multiple MOSFETs in parallel for higher current applications and it includes an integrated bootstrap schottky diode. The very fast 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, minimize switching losses and improve efficiency.
The LTC4447 has a 3-state PWM input for power stage shut-down that is compatible with single and 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 undervoltage lockout circuits on both the driver and logic supplies.
|Summary of Features: LTC4447|
|Synchronous N-Channel MOSFET Driver|
|High Drive Current - 3.2A Source, 5A Sink|
|38V Maximum Supply Voltage|
|4V to 6.5V Gate Drive Voltage|
|Integrated Bootstrap Schottky Diode|
|Adaptive Shoot-Through Protection|
|Top Gate: 8ns Rise Time, 7ns Fall Time when driving |
|Bottom Gate: 7ns Rise Time, 4ns Fall Time When Driving |
|Three-State PWM Input for Power Stage Shutdown|
|Rail-to-Rail Output Drivers|