Dear community,
I would like to ask you for some help with my problem. I have designed circuit with LM46002 according to relevant datasheet. At first look at real board everything looks OK, Vout=3.3V, teperature is low. But when convertor works in load (300 mA), you can hear slight whistling from inductor and osciloscope image shows about 6 kHz ripple with 50 mVp-p, instead of expecting 500kHz what you can see in simulation.
Could this issue be caused by wrong Cff (phase margin capacitor)?
Schematic:
Layout:
Thanks.