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STM32L4 VDD vs VDDUSB vs VDDA

Question asked by Patrice Favreau on May 1, 2018
Latest reply on May 11, 2018 by Jismal Jamal

I am designing with a STM32L4 in QNF48 and would like to save power...

 

How about

    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

 

 Thanks!!!

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