We want to use a 2.5V to 5V output from a microcontroller to gate on and off very fast the operation of the LMR16010 regulator chip. Using the enable is too slow because of the 4 ms soft start in the LMR so we want to use the FB pin to turn on or off the LMR but do not know if it is allowed and we do not know how fast it might work. We are hoping we can gate on or off the LMR at a repetition rate of at least 20KHZ.