I am designing with a STM32L4 in QNF48 and would like to save power...
VDDUSB = 3.3V
VDDA = 3.3V with linear regulator , VREF = VDDA
VDD = 1.8V
Now the data sheets say |∆VDDx| must be less than 50mv .
Is this mean all power need to be at the same level +/- 50mv, or that all of the same name need to be within 50mv