I’m really struggling to understand the min/max value of your voltage regulator, in order to have PD—Digital input (internal pull down) -300mV to 2.1V it’s quite some Khz away … what is the real max Vin, if Analog output, cannot be greater than 4.4V which is the max Input of the VCC.
In other words, this PD—Digital input (internal pull down) ---- resistor … 4.4 to 3.1 or 3.8 to 3.63V – therefore – the remaining minimum voltage. As in max aperage?? 2.1V / xWatts // however
the LDO which I could find would be 1.65 to 2.1 — but cannot find one that can stay at 2.1 it goes to 3.6 min and 5V
would 3.6v burn the ldo or the virtual switch for the PCIE_DIS?.

