I have 3.3v regulated coming out of pmic but one of my chips has a weird requirement of 3.6-4.2v in its vbat pins. Now I don't work with electronics at all except for stuff I did in school a long time ago. This datasheet says it can take my input voltage and convert it to between 3.6-4.2 depending on the resistors I choose. I remember reading somewhere that it you can only step down with an LDO, if that's true then I can't use this. Do I use one of those buck boost converters instead? I really don't know what I'm supposed to do since I can't test any of this and have 0 experience.
EDIT: Here are the datasheets of the chips I am interfacing.
Wifi: - on page 10 it shows the voltage specs and current consumption for the vbat pin? For current, on page 11 it says typical current consumption, does this mean vbat has to meet typical current consumption needs for it to work? I really don't know.