I have created schematic symbol for a voltage regulator in Altium. It has pin for voltage input and pins for voltage output.
Do I set the electrical type to power for all pins or do I set the vin to Input and Vout to output? I could just set all of them to passive as well. What is the correct way to do this?
When you validate your project the settings in the Connection matrix comes into play:
It can't catch all the errors you make but it might save you from some mistakes. I would set them to Power, then check any warnings I get. If the warnings and errors were just annoying I would set the pins to Passive.
If you want to use theese properties depends on your design environment. If you're a single inexperienced designer, you might want some extra help from the tool. If you are an inexperienced designer in a big team you might waive the ERC warnings and let the review board catch the errors. An engineer with many years of designing might find the Altium settings a nuisance and set everything to Passive because the errors the ERC can check (and generate) doesn't add any value.
Edit: Regarding simulations, I have never used Altium for simulations. At all the places I have worked the simulations have always been done by recreating the circuit in another tool, Hyperlynx, LTSpice etc.
If you are only concerned with designing a PCB and not running any circuit simulations within Altium, use Passive for all pins. The electrical rules check (ERC) will consider the pin types and their connections, thus if you don't have other details in place for the simulator, the ERC will generate warnings and/or errors which can become obstacles for simple PCB design.
There are extensions to Altium which will use this information as well, so the real answer is "it depends" based on what you or your company wants to do. For me, I do simulations outside of Altium so almost all of my component library is set up with passive pins (a huge task to fix if we ever decide to change it).
Check the official documentation for more information (though it does not really cover the pin electrical type in any great detail).
