Hi all,
	looking for a cheap and easy to use DC Step-Down Step-Up Converter to=20
3.3V, I found this:

https://www.banggood.com/3Pcs-Mini-2-in-1-DC-Step-Down-Step-Up-Converter-1_=
8V-5V-to-3_3V-Power-For-Arduino-p-1205021.html=20
that fits very well to my project.

But searching for more details about the IC, the only clue is the=20
silkscreen 'N1IF', from which I cannot trace back to a datasheet.=20
Googling around I found this ad

https://www.yoycart.com/Product/542865822576/

claiming the 'N1IF' IC to be a "hx4002b" charge pump. But again, no=20
datasheet for "hx4002b" charge pump.

Does anybody of you have seen or used this before?

Thanks,
	Massimo.
--=20
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