Lm317 Pin Diagram. It has many application circuits in its datasheet but this ic is known for being used as a variable voltage regulator. Looking from the front of the voltage regulator the first pin on the left is the adjustable pin the middle is vout and the last pin on the right is v in.
Vin v in is the pin which receives the incoming voltage which is to be regulated down to a specified voltage. This adjustable voltage regulator is available in different pin layouts such as lm317l lm317k and lm317t. Pin connections top view t o 22 0 t o 22 0f p d p a k lm217 lm317 pin configuration ds0433 rev 21 page 2 31.
This lm317 circuit is capable to provide variable dc power supply with an output of 1a and can be adjusted up to 30v.
The lm317 circuit is shown in the below figure is a t y pical configuration of the lm317 voltage regulator circuit diagram including the decoupling capacitors. Below is the pinout. However the functionality of all pins is the same for each type. 1 pin configuration figure 1.
