Electrical Engineering

My step-up converter makes audible noise both with and without a load.I am almost certain it is the inductor, because when I hold my finger on it I can feel vibration and it gets quieter. Unfortunately, I do not own an oscilloscope and cannot inspect what is going wrong. Here is the schematic: Image alt text

All the capacitors are ceramic, inductor is FXL0530-100-M, and the converter datasheet can be found here . On page 14, FIGURE 6-8 the recommended values are shown. Only thing I have changed are resistor values to match my output voltage, but this is a minor change. I read about audible issues with converters, and one of the points mentioned was that picking an IC with a higher switching frequency can help, but this particular one is at 1MHz, well above the one mentioned in the article I read.

What could be the reasons for this humming noise, and how could they be mitigated?

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Humming noise from a boost converter's inductor

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