Common Inductor Values for Switchmode Regulators

[nathanpc]

I'm going to start working with some switchmode regulators in the couple weeks, just playing around, taking some measurements under different loads, in other words learning how to properly use them. For this I'll need some inductors, so I would like to know which are the most common values of inductors in these circuits so I can play around with different values and see how they affect the efficiency and other things. Most of the designs I'm going to try are boost for voltages like 3.3V, 5V to 9V or maybe a bit more.

Any suggestions?

[lgbeno]

This is probably going to be highly dependent on your switch reg and switching frequency.  Just a quick swag but I'd say for a low MHz freq, 1uH to 15uH would be a good start.

Truthfully though physical hardware is nice and all but unless you want to spend a ton of time building and measuring stuff, this is something better to experiment with in simulation.


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[c4757p]

I'd probably go with a factor of ten lower frequency and a factor of ten higher inductance.


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[szhighstar]

is it commone mode choke or difference mode choke or storage emergy inductor or filter and so on? pin through or SMD configuration?

[jebcom]

Have you checked the data sheets? For example, the LM2596 data sheet http://www.ti.com/lit/ds/symlink/lm2596.pdf devotes a lot of space to selecting appropriate components -- not only the inductor, but input and output capacitor values and more importantly ESR, catch diode considerations, and even tips on board layout.