I'm using the LM317(adjustable voltage regulator). I had some problem getting the right output I want and finally I figured it out.
At first, to get the output of certain value I want, I referred the specification document and followed the application schematic that I attached. I put the R1 with 3K and R2 with 300 to get 1.3V output. But it didn't work. And I've struggled to figure out the reason. Finally, my colleague told me I need to use R1 with 240ohm and find out the value of R2 with respect to R1.He also said it is related to minimum load current.
And I did as he said and it's working now. And now I'm trying to figure out about what the minimum load current is and why I need to put 240ohm in R2.
I'm now seeing the inside schematic of LM317(attached), but I can't understand.
Can anybody explain about this?
At first, to get the output of certain value I want, I referred the specification document and followed the application schematic that I attached. I put the R1 with 3K and R2 with 300 to get 1.3V output. But it didn't work. And I've struggled to figure out the reason. Finally, my colleague told me I need to use R1 with 240ohm and find out the value of R2 with respect to R1.He also said it is related to minimum load current.
And I did as he said and it's working now. And now I'm trying to figure out about what the minimum load current is and why I need to put 240ohm in R2.
I'm now seeing the inside schematic of LM317(attached), but I can't understand.
Can anybody explain about this?