As a novice to EE concepts who's trying to apply it to Arduino projects, I was doing hours of research on how to electronically switch another higher current (or voltage) device/component/subsystem on and off.
I've read many long questions on lots of forums trying to solve this same problem, but only see different configurations of MOSFETS or transistors or combinations with some resistors recommended as the solutions.
Only this tutorial mentioned another option which was load switches. I then found several articles (example, example, and example) extolling their virtues. They small, cheap, some are crazy efficient, and they seem way simpler (especially to someone learning the basics) with fewer (or no) extra resistor sizing and other ancilliary components needed. Appears to just be Vin, Vout, GND, Signal.
The very tricky knots people are trying to unravel with for example Arduino circuits with unexpected current flows down controls pins and being unable to saturate the transistors or wrong sizing the resistors seems way overcomplicated in many cases if these are as simple as advertised.
So what's the catch?
These articles read almost like marketing material.
- Main Question: Why are standalone MOSFETS (and transistors) preferred over IC load switches?
- What's the downside of load switches compared to transistors/MOSFETS?
- Why aren't they as preferred or recommended?
I am surprised not to see them on the common maker movement beginner electronics stores.