what is the output and voltage on an 18a chip with 5v goin in. I am planning on putting a 12v solenoid on it n i need to know how many volts it gives out so that i can up it for the solenoid. If you need any more info please say. thanks.
Depends on the load.
With no (or very light) load, it is close to whatever the power rail is at.
With a 330R+LED it will drop about 1v.
Maximum current is 25mA.