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Does somebody could kindly provide the figure of "ripple rejection vs. frequency" regarding the power mangerment IC UA78M05? Because the datasheet of UA78M05 which I could download on this website http://focus.ti.com/docs/prod/folders/print/ua78m05.html#technicaldocuments is very simple, only include a brief description and "Electrical Characteristics".
Hello Kobe,
I found PSRR vs. frequency data on a nominal sample unit, but the frequency range was limited. I attached the data to this post.
No output capacitor was used.
Above 1 kHz the rejection ratio should fall at -20dB per decade.
Regards,
Ron M.
Thanks a lots, Ron.
Sorry to disturb you again. Do you have a detailed data as you attached, but the frequency range is from 1 KHz to 1 MHz?