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REF34-Q1: Reduce COUT capacitance

Shinji Tsuji
Genius 14149 points
Part Number: REF34-Q1

Tool/software:

Hi team,

I am considering to reduce COUT capacitance for cost reduction in below configuration.

COUT is recommended to select between 1uF to 10uF in the datasheet. 

Could you please advise which parameter (PSRR...) will be affected by reducing this capacitance. 

Could you also share me the PSRR plot up to 10MHz if available?

regards,

  • 0
    TI__Intellectual 1530 points

    Hi,

    Reducing load capacitance will at least affect the performance of the reference when subjected to transient loads, which can be seen in figures 8-10 through 8-13. I will check with my team to confirm any other specifications that will be affected by reducing the load capacitance.

    We do not have any additional PSRR plots beyond what is given in the datasheet.

    -Henry

  • 0 in reply to Henry Naguski
    TI__Intellectual 1530 points

    After speaking with the team, I would like to add that REF34-Q1 is specified to be stable with an output capacitance from 0.1µF to 10µF, not 1µF to 10µF.

    The main concern is the transient load performance, but the device will be stable down to 0.1µF.

    -Henry