Hi all, I'm trying to sort out a power supply for a project and the voltage regulator I'm using is getting really damn hot.
The voltage regulator in question is the L9705CV (5v 1A) (http://pdf1.alldatasheet.com/datasheet-pdf/view/22629/STMICROELECTRONICS/L7905CV.html) The plug I'm using with this is rated 7V 1A.
For now I'm just testing it on a breadboard with the fixed output regulator circuit in that datasheet and a LED wth resistor as the output. I've read the datasheet through and decided that a 22uf capacitor would be best for Ci, and 10uf for Co as I'm using electrolytic capacitors and it mentions using at least 10 times the capacitance if not using tantalum caps.
it's getting hot enough to smoke and burn my fingers when it's running, do I need a huge heatsink? Or is it more likely that I have done something wrong here?