Lm317 Adjustable Voltage Regulator Circuit

The device features a typical line regulation of 0 01 and typical load regulation of 0 1.

Lm317 adjustable voltage regulator circuit.

This lm317 calculator can be also be used for some other ics like lm338 or lm350. The adjustable pin is connected with the two external resistor and connected with the vout pin of the ic. Adjust voltage in steps 3v 6v 9v 12v. Resistor network comprising of r1 and r2 connected in association to the pin1 adj is used to set the output voltage.

In most of the applications due to irregular loads the output voltage produced has fluctuations in it which can lead to damaging loads. High quality 3a adjustable voltage regulator. 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. It serves as an interface between a wall outlet and common power electronic equipment.

This lm317 circuit is capable to provide variable dc power supply with an output of 1a and can be adjusted up to 30v. It was designed by bob pease who also worked for national semiconductor. It requires only two external resistors to set the output voltage. The device features a typical line regulation of 0 01 and typical load regulation of 0 1.

Using lm317 and 2n3055 so easy and cheap. For example if the target output voltage is 10v then the r2 value is calculated as following. A classic voltage regulator circuit using lm317 is shown above. 10 1 25x 1 r2 240 r2 1680ω.

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. This voltage regulator circuit is very simple. Lm317 is a positive voltage regulator with an adjustable voltage range from 1 25 v to 37 v. The lm317 is a popular adjustable positive linear voltage regulator it was designed by bob dobkin in 1976 while he worked at national semiconductor.

So this is how we calculate the r2 and output voltage for lm317 voltage regulator circuit. 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. Working of lm317 voltage regulator circuit. And in fine 1 25v to 20v.

It can supply greater than 1 5 a at the output. Input voltage is fed to the pin3 v in of the ic and regulated output voltage is available from pin 2 v out of the ic. The capacitor c1 used for the filtering of dc input voltage and further fed to the vin pin of the lm317 voltage regulator ic. 4 lead acid battery charger circuits see 4 lm317 lead acid battery charger circuits for 6v 12v and 24v battery.

In this project we are going to design a simple adjustable power supply circuit using an lm317 voltage regulator ic. It requires only two external resistors to set the output voltage.