Ok, I made a PCB and built this circuit and it works just fine. However, the output voltage is suppose to be 5V and at light load it ouputs 4.9V and at full load (1A) it outputs about 4.82V. Is 0.08V decent load regulation or is that pretty poor? Also, is there any reason why the light load output voltage is 0.1V off of the intended voltage? I used 1% resistors everywhere in the feedback network. Where can I check in the circuit to see where the problem is?
Also, at loads approximently greater than 0.3A, if I put my ear really close to the circuit, I can kinda hear switching noises, probably from the transistor or inductor. Is there normal? Is there anyway to supress this?
Thanks.
Schematic for the circuit is attached.
Also, at loads approximently greater than 0.3A, if I put my ear really close to the circuit, I can kinda hear switching noises, probably from the transistor or inductor. Is there normal? Is there anyway to supress this?
Thanks.
Schematic for the circuit is attached.