efficiency of high frequency buck smps
Since the switches are integrated, there is not much to be considered about the design, except the layout. Layout is key to good power supplies.
Once you have a layout in mind, you can send it to me and I can take a look at it and provide you some feedback.
Also, if you are really concerned about EMI, in your case I suggest you use a shielded inductor. Avoid the "open-core" or rod inductors, as their magnetic field will induce voltages in every trace nearby.
You should also consider the output ripple. Try to minimize it by using low ESR caps (ceramics). You may also consider using filters on the supply rail for your sensitive sensors. Small LC filters (ceramic cap plus a small inductor or even ferrite bead) can do a good job. But I would determine first if the noise really affects them. If the switching frequncy is high enough, it is possible your sensors will just filter it out themselves.
Regards,
VVV