I sent a PM to MojoAtomic but I thought I'd share my thoughts. I haven't bought anything yet but I found this substitute which appears to be around half the price of the part number MojoAtomic used.
Would there be any disadvantage to using the cheaper part? Efficiency is still well above 90% and it comes with short circuit protection, for example if you wire a custom joystick the wrong way and plug it in and it shorts the console, nothing gets fried.
I am tempted to order a batch of them as all my 4th gen consoles and back used 7805 regulators and could use the upgrade. However I wonder if ripple current effect would cause jailbars? My Trubografx really needs a replacement, as it runs a bit warm and outputs 5.65V.
Also do I need a 220uF or 22uF electrolytic? Lot's of values all with 22 being thrown around, including .22uF as well, but those are all orders of magnitude difference in component value. Too high a value would stress the regulator on startup, and possibly momentarily "brown out" the console as VCC climbs up to spec. If it takes more than a couple milliseconds to reach 5V, would that negatively impact initialization and boot sequence?
first glance the input voltage window is a bit smaller, which means it doesnt have to deal with as much. There's probably a bunch of little differences in performance tween the two, but realisticly for the intended use I doubt it would make much difference
as far as caps go, most of my designs include a small and a large cap for input and output filtering, like lets say a 0.1uf and a 100uf in parallel ... small caps smooth out high frequency noise, big caps smooth out low frequency noise (btw there is math to it all but I will spare everyone)
also short circuit protection, only protects that part (7805 has it as well, it gets hot and starts to oscillate hehe, but it it by design to do that) only protects that part, so if you short out a couple pins on the CPU enough to shut this thing off, you probably toasted those IO on the CPU doing so
its like a fuse, its not there to protect your crap, its there to keep your house from burning down when your crap gets messed up
Edited by Osgeld, Sun Mar 19, 2017 4:00 PM.