I'm simulating a RLC series circuit fed with a 60Hz 3.3V square wave coming from a microcontroller. The inductor series resistor is 100 ohms, so the total R= 110 ohms. According to the simulation, the peak current is about 17 mA for those values. I would like to do the proper math to get that result. It looks like the circuit is overdamped, R^2 > 4L/C. But I don't come up with those 17 mA peak. How do I calculate it? If you have any book or resource that helps me understand this better, I will appreciate it. Thanks.