A couple of questions about the LTC3115-1, after noting that oscillations occur on either side of the switch depending on buck vs. boost mode:
- Is this the reason that Layout recommendation is to put GND plane below and around the inductor – as to minimize the coupling between Cbst1 and Cbst2? Or this GND measure is purely for EMI? What will happen if there is no GND right under the inductor (layer 2)?
- Can the cap on the Vout be connected directly to pins 4 and 5? (Kelvin back to GND)?
Thank you for your help.