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LTC3899 noise caused by inductor

Hello everyone,

I encountered a problem when working on a design for a power supply with LTC3899. At some point I started to hear a noise near the converter and from my experince it sounds like an inductor which is saturated. I have 12V as Vin for the boost and it gets 12.62V output that is used further as Vbias for this converter and one of the bucks get 10V output.

Do you think that the noise could come from anything else? The converter is set to work in continuous mode.

Kind regards!

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