I'm working on a project where my Arduino Nano needs 5V, and I'm using a networking module (ENC28j60) that should run at 3.3V.
My power source is an 18650 Lithium (3.7V nominal), so I'm currently boosting that to 5V with a boost converter module.
The Arduino has a 3.3V supply, but it can't deliver the current that the ENC module needs, so I need to get that 5V supply down to 3.3V. My inexperienced knee-jerk solution was a voltage divider, but I've learned that, for obvious efficiency reasons, that is a bad idea for a battery powered project. My next idea is to use another converter, a buck converter this time, to bring the signal down.
However, some part of me says that, since the boost is basically storing energy and "surging" it out to achieve boost, and the buck is basically going to build a PWM signal and smooth it with capacitance, they may not play well together. I'm not experienced enough to really know how that interaction will play out.
Any thoughts?
Thanks
My power source is an 18650 Lithium (3.7V nominal), so I'm currently boosting that to 5V with a boost converter module.
The Arduino has a 3.3V supply, but it can't deliver the current that the ENC module needs, so I need to get that 5V supply down to 3.3V. My inexperienced knee-jerk solution was a voltage divider, but I've learned that, for obvious efficiency reasons, that is a bad idea for a battery powered project. My next idea is to use another converter, a buck converter this time, to bring the signal down.
However, some part of me says that, since the boost is basically storing energy and "surging" it out to achieve boost, and the buck is basically going to build a PWM signal and smooth it with capacitance, they may not play well together. I'm not experienced enough to really know how that interaction will play out.
Any thoughts?
Thanks