The gate driver is used to control the external
N-Channel MOSFET by setting the appropriate GATE-to-SOURCE voltage.
Before the gate driver is enabled, the following
three conditions must be achieved:
- The EN pin voltage must be greater than the specified input
high voltage.
- The VCAP to SOURCE voltage must be greater than the
undervoltage lockout voltage.
- The SOURCE voltage must be greater than the VSOURCE POR
rising threshold.
If the above conditions are not achieved, then the GATE pin is internally
connected to the SOURCE pin, assuring that the external MOSFET is disabled. After
these conditions are achieved, the gate driver operates in the full conduction
mode.