Report Double the Carbon, double the fun in Do It Yourself Posted May 15 · Edited May 15 by simmconn Thanks. A fixed-setting current limiter before the passing device would also help the SOA issue. I can also do something like the following: With carefully selected R5 and R8 values, M1 and U4 can split the start up VIN. A resistor can be added to the M1 source so it also acts as a current limiter during normal operation. After all, most of the high voltage Si-MOSFET and SiC FET are designed for switching applications. We need to tread carefully when using them in linear mode.