I want to determine my minimum and maximum resistance rating for my variable resistor but failed to find the relevant information in the datasheet (this might be an issue more 'noobs' might have, therefore the question here).
- I chose a SMD Variable Resistor (LCSC link) rated at 15kΩ because it's close to the desired range (24-33kΩ), and because it's assembled by JLCPCB (and in stock).
- Where in the datasheet (link) do I find the minimum and maximum resistance, approximately (standard environment)?
- (Are there general 'rule-of-thumbs' for variable resistors when it comes to min/max resistance ratings?)
Background (to avoid XY problems):
I want to regulate 3.7-5V -> 3.3V (either from lipo or usb port), I determined STI3408B is a good choice: it provides up to 1.2A and has a somewhat low quiescent current of '40µA' (I'm sure that's variable depending on multiple factors I'm currently unaware of) and it doesn't have the thermal issues as linear regulators. Using a similar component, I measured my reference voltage to be around 0.7V (using off-the-shelf multimeter), not 0.6V as in the datasheet. I'm unsure if (or why) this is really an issue, but to minimize the potential of errors (that require re-soldering), I concluded a variable resistor for
R2 would be suitable, the formula to determine the output of the IC seems to be fairly standard (see below), where
Vout is between
2.6-3.6V (esp32) and I planned
R1 to be