I have the output of a 5V square wave comparator. Can I feed this square wave into a 3.3V regulator to get a 3.3V square wave? The 3.3V regulator I have is LP2950.
Gunner Posted on December 29, 2020
I simulated it, but it doesn't work if I connect the voltage regulator chip and it is not a square wave. Maybe you can try other methods.
Jamari Posted on December 29, 2020
This problem can only be tested in practice. Sometimes the theory is OK but the waveform is not ideal.
Robin Posted on December 29, 2020
It should not be ideal, unless your 5V square wave has a certain drive current capability, thinking that the voltage regulator will consume current, otherwise the waveform will be deformed, and then filter capacitors must be added to the LP power supply and output. In this way, the rise and fall are very slow. It will still be deformed unless the square wave frequency is very slow.
Cassius Posted on December 29, 2020
Normal people’s idea is to chop 3.3V to generate a square wave through a triode.
