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buck switchers and feedback resistors

buck switchers and feedback resistors

buck switchers and feedback resistors

(OP)
Does anyone know of any specifications as to what the minimum distance between a feedback resistor to the power source and switcher is?  Would 2-3 inches be too far away?  What are (if any) the effects of placing it this far away?

RE: buck switchers and feedback resistors

I think you mean maximum distance.  2 to 3 inches may be OK, depending on your layout.  A good clean PCB, and it should be no problem.  Anything else, and you will probably be picking up enough noise to adversely affect your regulation.

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