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TPS7A47: Looking for high PSRR LDO

Ian Wang
Mastermind 25095 points
Part Number: TPS7A47
Other Parts Discussed in Thread: TPS7A91

Hi Sir,

My customer looking for high PSRR LDO as below condition, would you pls help advise which one will be better?

(I cannot get any solution is website selection.)

Vin=3.9V

Vout=1.05V

Io=1A

PSRR: as high as possible.

Thanks, Ian. 

  • 0
    TI__Mastermind 43630 points

    Hi Ian,

    PSRR is a parameter measured over frequency and drop-out. For the conditions above one of our best LDOs for PSRR and low noise might be the TPS7A91. 

    Here is one of the many PSRR plots from the TPS7A91 datasheet:

    Do you think this can work for you?