hi guys, my power supply is a car battery 12v and i have to step down to 3.8v with these current restrictions
Peak (worst case): 2.5A
Continuous (worst case): 650-700 ma
the question is what’s the adequate step down regulator that i can use to feet these restrictions?
Pololu makes a great line of voltage regulators, very many of which will satisfy your requirements.
However, you will need to add additional input protection if you will be using this in automotive circuitry, which can produce high frequency noise, voltage reversals and voltage spikes greater than 125V.