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TPS7A7300: Question about PSRR performance

Lauren Mayfield
Expert 7240 points
Part Number: TPS7A7300

Hi team,

What is the PSRR level for this device when operated at 5V 3A output?

Thanks!
Lauren

  • 0
    TI__Mastermind 44805 points

    Hi Lauren,

    Figure 21 has PSRR data for VOUT = 3.3V, IOUT = 3A. This plot can likely be used to approximate the PSRR for the given specifications because the important operating conditions are specified in the plot - namely VIN, VOUT, IOUT. The trend for PSRR is that with constant load, increasing the VIN - VOUT differential increases PSRR. More generally, moving farther away from dropout increases PSRR. So, if the input voltage in this application is larger than 5.5V, the PSRR will be better than the VIN = 3.8V, IOUT = 3V curve in this plot. Attached is a slideshow discussing the things that do and do not effect PSRR for reference.

    6320.What effects PSRR.pptx

    Regards,

    Nick