This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TPS7A8300: PSRR issue

Part Number: TPS7A8300

I'm reading this article

Understanding power supply ripple rejection in linear regulators

PSRR=20log(Ripple input/Ripple output)=20log(Av/Avo)

But why Ripple input/Ripple output=Av/Avo, I don't understand that.