Hi,
For lower output voltages, lower switching frequencies are recommended for LMZ31704. I am assuming this is to satisfy a minimum on-time requirement for internal FET switch. Can I opt for higher values of switching frequency for lower voltages? (For a specific case of VIN=12V, VOUT=0.9V, Can I choose switching frequency of 1000KHz, as against 250khz mentioned in datasheet?. This will help in reducing the current ripple and in turn reduce voltage ripple, for a given set of caps)
What is the minimum on-time requirement, if any, for the internal switch?