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 (and does the input to SYNC have any effect on the PFM behavior in this case)?
Answer:
The SYNC feature is supported only for PWM mode.
In fact, when the SYNC pulses are applied, the part transitions to PWM.