My lm46002 work great but one a while, the chip stop working. I have read a thread with the same title as this one that have exactly the same problem has mine. I wanted to know what was the issue. The Vcc doesn't raise to 3.2V it stay at 0.37V. if I supply a external 3.2V to the chip it start working properly even if I remove the external supply. In the other thread you asked if Vin could go below Vout, what happen if on a power down the Vout stay for a while while the capacitor discharge. My problem seam to begin when we cycle the power (not every time, it happen very rarely but it happen)
Vin = 36V
Vout = 5V
Iout = 50mA to 2000mA
Thank you.