Is there a difference between a 7805 regulator and a LM7805?

The short answer is, "no".  These are essentially the same part. The  5 volt version of the 78-series linear voltage regulators in a T0-220 package.  Predictably, the one sold by RadioShack(r)  is priced higher.

If you are wondering what the "LM" stands for, I think it is a prefix belonging to a particular manufacturer.  The confusing thing is that I think I have seen more than one manufacturer making the same chip starting with "LM".  The links below might, or might not, offer some clues to the mysterious "manufacturer's prefix". 



juniortan10 months ago

They are both kinda similar, except that the 7805 is spec'd for 1.5A and LM7805 for 1A nominal output