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LP5907 – About PSRR Loads graph

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Guru 21045 points
Other Parts Discussed in Thread: LP5907, LP5907-Q1

Hi Team,

 

Our customer are studying LP5907 at the following conditions.

So, LP5907 is used at the back of DC-DC converter.

Therefore, they would like to know the PSRR of the range from 1MHz to 2MHz.

Could you please send it to us if you have this graph?

 

<LP5907 conditions>

-Vin=3.25V

-Vout=2.9V (or 2.85V)

-Iout= up to 250mA

 

 

Regards,

Kanemaru

  • 0
    TI__Mastermind 22610 points

    LP5907 PSRR chart to 10MHz can be found in the LP5907-Q1 datasheet ...

    http://www.ti.com/lit/ds/symlink/lp5907-q1.pdf

    This PSRR chart, along with the better functional block diagram, is scheduled to be included into the reformatted (SDS) LP5907 datasheet by the end of the year. Probably sooner, as the reformatted LP5907 datasheet is now in the que for final admin review.

    Be aware that 1MHz to 2MHz is at the end of the bandwith of the LP5907 control loop so the operating Vin-Vout, operating output current, and the Cout characteristics (ESR, ESL, C) will begin to dominate the PSRR results.

     

  • 0 in reply to Donald Jones
    Guru 21045 points

    Hi Donald-san,

     

    Thank you always for the information!

    We will report the information to our customer.

     

    Regards,

    Kanemaru