Hi, I am using a buck boost converter MC34063 to bring 14.8 V from four Li Ion batteries in series down to three different voltages 12V, 5V and 3.3V. I am planning to use the step - down converter given in the datasheet (image below) to do this but specifically how do modify the circuits components (the resistors) to get the voltage I want? Please help me with the calculations know-how...
MC34603 datasheet
MC34603 datasheet