I would like to use SIM800L for M2M. I have power of 5V 2A for powering uC board and would like to add gsm module. It seems that SIM800L has rather strange voltage input rating: 3.4V - 4.4V. What would be proper way to power it up with this configuration?
One proposal was to use zener diode with VF 1V, is this viable solution?