Lm317 5v Regulator Circuit

The lm317 ic has many features such as current limiting thermal protection and safe operating area protection.

Lm317 5v regulator circuit. It can also provide a float function for high voltage uses. Featured is the constant voltage. It requires two external resistors to adjust the output voltage. The capacitor c1 used for the filtering of dc input voltage and further fed to the vin pin of the lm317 voltage regulator ic.

Almost equal to the voltage of the battery. The lm317 device is an adjustable three terminal positive voltage regulator capable of supplying more than 1 5 a over an output voltage range of 1 25 v to 37 v. Lm317 is a three terminal voltage regulator ic with a high output current value of 1 5a. Dual power supply circuit can select voltage levels 3v 5v 6v 9v 12 15v at 1a and 3v 5v 6v 9v 12v 15v at 1a use lm317 positive lm337 negative usb battery replacement this is a usb 5v to 1 5v step down converter circuit.

When we view many circuit ideas i found that as figure this below number second the power supply projects in my life have the best fit. When we use a cheap mp3 player which uses only one 1 5v aa battery as its power supply. The function of components c2 filter capacitor eliminates the power spike voltage before comes to lm317. See the feature like this circuit.

1 5v 3v 4 5v 5v 6v 9v lm317 selector supply. Diode d3 and capacitor c3 forms a compensation circuitry for the opamp. The output voltage v out is dependent on external resistor values r 1 and r 2 according to the following equation. Low dropout 5v regulator.

We use a dc voltage regulator number lm317t is the heart of the circuit. Lm317 is an adjustable voltage regulator which takes an input voltage of 3 40v dc and provides a fixed output voltage of 1 25v to 37v dc. We know lm317 is a popular adjustable positive voltage regulator with capability of delivering 1 5a output current to the load over an output voltage range of 1 25 v to 37 v. The adjustable pin is connected with the two external resistor and connected with the vout pin of the ic.

Low dropout voltage regulators circuits that can converted voltage input from 6v to 5v output they use transistors as main components. How lm317 calculator works. Working of lm317 voltage regulator circuit. In addition to lm317 lm310 a single operational amplifier is also used in the circuit.

Simple variable lm317 voltage regulator circuit using few easily available components has been designed and tested in this article as follows. Which you can add more voltage range with some resistor at the s3. Lm317 has only three terminals and gives variable regulated output. Lm317 low dropout regulator circuit at 2a when we need a 5vdc power supply but the level voltage input low 5 1v only.

The circuit shown above is of a 5a constant current constant voltage regulator using lm317. 0 30v 3a variable regulator using lm723.