My power supply has a very audible noise. Noise is coming from the output inductor so maybe this is OK.
However, regulation is also inaccurate - slowly climbing from 12V to 13V with no load (3.3kOhm resistor minimum load present).
The regulated voltage looks clean and has no significant noise, only the strange change over time (approx 2 minutes from start to arrive at 13V).
There is no significant heating of any component and apart from the voltage issue everything is working well (I can successfully pull 240mA, my system maximum)
I hope you can help with suggestions on what may be wrong (or not) - I am including some relevant data and measurements.
The measurements look quite noisy, but perhaps you can verify that these are correct?
L1 is LPS6235-155MR (1.5mH 130mA at 20% drop)
L2 is MSS7348-105ME (1.0mH 270mA 20% drop)