Any Idea of the PSRR on the QPC6713 VDD input? Are there any recommendations for power this part? LDO vs Switching Regulator? Thanks!
The QPC6713 Vdd PSRR has not been tested. It should be quite good on PSRR since the part has internal charge pumps generating bias voltages, and resistors isolating the FETs in the DSA from the supply. I’d be conservative and recommend an LDO, but depends how much noise and frequency of spurs the switching regulator generates. There may be other components in your design that are more sensitive to supply noise.