Starting with the TPS53819A reference simulation model, I changed the bottom feedback resistor from 10K to 2.23K in order to create a 3.3V output. I also changed the load resistor from 60m-Ohms to 600m-Ohms. The simulation overshoots the output voltage to 4.0V and then shuts down without ever regulating. The voltage on the FB pin exceeds 600mV, but the SW node keeps switching. Can anyone tell me what the issue is?
I also tried increasing the inductor to 2.2uH in case there was a current ripple issue, and also increased output caps but without success - the output always overshoots and then shuts down.
thanks,
Lance