I need help for my project: I am using an adapter operating from 12V and I need 2.5A at 4.2V for my SIM808. In the datasheet it says it has a 2A peak. I used an LM2596S and WEBENCH® Designer LM2596(online calculator) and I designed this circuit:
Can someone tell me if this is OK: do I need to change anything or choose another regulator? I don't have the parts to test the circuit.