7805 to USB, no need current limiter?

[LOLsim]

I have a 7805 circuit, can I connect it directly to a USB port to power off some USB devices that might take up to 500mA?

There is no proper current limitation as the 7805 can provide more than 1A.

The power source for the 7805 is a 12V Lead acid battery. There is also a 1.45A fuse for protection of my other circuit.

 

[cameo_2007]

I have a 7805 circuit, can I connect it directly to a USB port to power off some USB devices that might take up to 500mA?

there should not be absolutely any problem in using it.

There is no proper current limitation as the 7805 can provide more than 1A.

that does not matter.It will provide only what the load asks for ,and that is 500mA.

But make sure that you provide a heat sink for 7805.
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[LOLsim]

OK, thanks. I'm worried about the current flow. Maybe I'll just put a 0.5A fuse to protect it from shorts.

 

[cameo_2007]

you need not actually worry about the o/p current limiting of the regulator.
If you look at the data sheet, It has inbuilt short circuit protection.It will tolerate the short.