The filter would be placed after the main inductor of the converter & before the feedback point, like so (from Understanding, Measuring, and Reducing Output Noise in ... TI E2E support forums https://e2e.ti.com › cfs-file › __key › 3362.unders... ): …
Shinichi Inoue said: Could you please share recommended layout and test data with me?
Layout recommendations as per datasheet. As for test data, you can refer to this presentation material:
8345.understanding_measuring_and_reducing_outputnoise_0.…
Hello
Here are more resources for measuring and reducing output ripple and noise.
Thanks
https://training.ti.com/understanding-measuring-and-reducing-output-noise-dcdc-switching-regulators
https://e2e.ti.com/blogs_/b/powerhouse/archive/2016/07…
Hello
I am unable to contact the original engineer that worked on that blog.
However, I have attached some references that may be helpful.
Thanks
4861.measuring_output_noise.pdf 7838.understanding_measuring_and_reducing_outputnoise_0.pdf
Hello
Yes you can try to parallel a ceramic with the tantalum.
You may also want some capacitance at the node VCC_3P3_SOM
Also, check the self-resonant frequency of your inductor. Try to choose an inductor with a
high self-resonant frequency,…
Hello
I assume you are measuring the noise on the output voltage.
It is difficult to measure the output voltage ripple/noise accurately on a DC/DC converter.
I have attached some application notes that may help.
Please try some of the suggestions…
