No, the current limit of the device which is sensed via the internal high side FET is 5.1A. The inductor should not go into saturation before hitting this peak current limit.
It is acceptable to have a small external load on the VCC pin. For example the EVKIT for this IC uses a 10kOhm resistor on the VCC pin to act as a pullup for the /RESET pin which results in a ~0.5mA draw…
Yes, when the input is shorted to GND, the energy from the output capacitor is discharged by a large current through the High Side FET body diode and Low Side FET body diode alternately (ILX).
Question : If the SYNC pin is used and the PFM mode is selected what is the behavior of the Himalaya Buck Parts? Does the SYNC input take precedence or does the part still go into PFM mode at low loads…