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TDA4VM-Q1: VDD_MCU Recommendations

Cameron Hagg
Expert 3015 points
Part Number: TDA4VM-Q1


I have a customer looking into using the TDA4 and had a question about the recommended operating conditions. In the datasheet, VDD_MCU nominal is .8V, but our PDN has the rail set to .85 V. Why is it set to .85V?

  • +1
    TI__Guru 52805 points

    0.85V is within the valid range for VDD_MCU.  The reason it is set to 0.85 is be cause it is also combined with the SRAM rail on the MCU (VDDAR).  This rail requires 0.85V.  We could power VDD_MCU at 0.80…but that would require another power regulator.