The LM317 is a three-terminal adjustable positive voltage regulator, it can capable of supplying more than 1.5 amperes over an output voltage of 1.25 volt 30v. it is easy to connect to the electronic circuits. furthermore the line and load regulation are better than other voltage regulator ic or transistors.
Pinout
- Pin number 1 The voltage adjustable pin
- 2nd pin is the voltage output
- 3rd pin is the Voltage input pin
LM317 Features in datasheet
- The output voltage range from 1.25 volt to 35v.
- Output current greater than 1.5 A.
- It has an internal current limit.
- Contain an internal thermal overload protection
- Adjustable voltage with stability.
The LM317 will function as a precision current regulator. An Electrolytic capacitor is added to improving output stability. The LM317 is packaged in standard transistor packages which can easily be mounted with a heat sink.
LM317 Voltage Regulator Circuit
LM317 output voltage formula
Voutput = 1.25V (1+R2/R1)
