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.

Adjust voltage in steps 3v 6v 9v 12v. 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 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. High quality 3a adjustable voltage regulator.

The adjustable pin is connected with the two external resistor and connected with the vout pin of the ic. This lm317 calculator can be also be used for some other ics like lm338 or lm350. It requires only two external resistors to set the output voltage. It was designed by bob pease who also worked for national semiconductor.

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. It can supply greater than 1 5 a at the output. So this is how we calculate the r2 and output voltage for lm317 voltage regulator circuit. It requires only two external resistors to set the output voltage.

Lm317 is a positive voltage regulator with an adjustable voltage range from 1 25 v to 37 v. It serves as an interface between a wall outlet and common power electronic equipment. Using lm317 and 2n3055 so easy and cheap. 4 lead acid battery charger circuits see 4 lm317 lead acid battery charger circuits for 6v 12v and 24v battery.

With automatic charging and full charged indicator using tl431. A classic voltage regulator circuit using lm317 is shown above. A dc adjustable power supply is an integral part of any power supply unit used in electronic equipment. The device features a typical line regulation of 0 01 and typical load regulation of 0 1.

10 1 25x 1 r2 240 r2 1680ω. For example if the target output voltage is 10v then the r2 value is calculated as following. The lm317 is a popular adjustable positive linear voltage regulator it was designed by bob dobkin in 1976 while he worked at national semiconductor. 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.

The lm337 is the negative complement to the lm317 which regulates voltages below a reference. And in fine 1 25v to 20v. In most of the applications due to irregular loads the output voltage produced has fluctuations in it which can lead to damaging loads. Resistor network comprising of r1 and r2 connected in association to the pin1 adj is used to set the output voltage.

In this project we are going to design a simple adjustable power supply circuit using an lm317 voltage regulator ic. Working of lm317 voltage regulator circuit.