Right now I am creating the schematic and the final pcb layout of my circuit in Diptrace so that I can etch the PCB myself.
I am going to use LM2985-3.3 SMT LDO from Texas Instruments in my circuit to step down the 5V supply. This IC is available on SOT23-5 package. Since I could not find this component in the default libraries, I am attempting to create my own.
Couple of questions
In SOT23-5, what does 23 and 5 stand for?
The chip dimensions in the datasheet are not exact, but a pair of min/max. Why is this so ? While drawing the component, which one do i take into account?
Lastly, any good link to a good tutorial for creating custom component/pattern in Diptrace?