Apology for the ambiguous Topic.
So I have 12V input from an SMPS to drive a circuit that requires 4V and 5V.
Because of circuit limitations, the 12V output feeds a buck converter in which drives some devices along with another buck converter to obtain 4V.
Is there a problem with this configuration in the long run ? or should I rewire the circuit as to 12V output feeds the Two buck converters directly?