I wanna replace R1 with 0.5W 5k6, much easier and cheaper than replacing the trimmer, there's multiple solder points that would be desoldered with the trimmer... (in fact 2, 2 too many)
Hi, back again from holiday, I want to build the 36V LM2576 buck now, I selected my resistor R1 at 750R, because I can get R2 VAR 22K, but now I see datasheet says R1 minimum 1K, what will happen if I use a 750R?
[http://appnote.avrportal.com/calculator/lm2575]