I would like to power an ESP32 in my car, so the input voltage is between 11 and 15v, and the output voltage should be 3.3v to power the Arduino board.
I thought that LDO were only for low dropout voltage. However, I saw that for example, the esp32 is powered with the usb 5v interface through a LDO ASM1117 3.3v. So the dropout voltage is around 1.7V...
Is this normal? What is the highest dropout voltage usable with LDO or linear regulator?
In my case, I think that the only way to power the esp32 is to use a buck converter, but if you have some solution with a linear regulator, I am interested for my understanding!