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Help Me about My Project

Posted by varmon 
Help Me about My Project
May 02, 2017 11:40PM

I am planning to design a card reader of wide voltage power supply. The power supply chip is MC33063A. I will appreciate it if you can give me some available suggestions.My situations is given below:
The input of power source is 24V and the output is 3.3V. But I found that the power wave of 3.3V have arrived 500mV.
The wave picture is given below as well as the schematic diagram and PCB. Please give me some advice and thought about why the wave so big? How to drop it?

Thank you in advance.
Have a good day~
Re: Help Me about My Project
November 14, 2017 08:20AM
That's an interesting idea. Are you still working on this project?
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