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LP5910: PSPICE model limitation

Roy Chou1
Genius 12635 points
Part Number: LP5910

Hi Team,

I would like to check the PSPICE model of LP5910. Below is the PSRR simulation and we found the sentence "PSRR is modelled only till 1st pole and 1st zero"

And our questions are showing as below.

1. Is there another LDO model not have the limitation?

2. why the model have this limitation?

Roy

  • 0
    TI__Mastermind 29320 points

    Hi Roy,

    Yes, the PSRR is modeled until the first pole and zero in the frequency response curve.  This is a limitation of the model architecture adopted at the time of this model creation.  Unfortunately we do not have any additional models available which provide increased accuracy.  Still, if you need additional insight into the device, we recommend you obtain an EVM and perform a measurement using your real loading.

    Thanks,

    - Stephen