Add component to LTSpice - All About Circuits
Apr 8, 2010 · Here is the Spice model I used for the LM317. Code: *LM317 TI voltage regulator - pin order: In, Adj, Out *TI adjustable voltage regulator pkg:TO-3 .SUBCKT LM317 1 2 ...
LM317 LDO design excercise - All About Circuits
Nov 20, 2025 · The LM317 in normal regulator operation, is designed to maintain the Out pin voltage at a value of Vref (1.25V) greater than the ADJ pin voltage, no matter the external …
LM317 current source simulation - All About Circuits
Mar 30, 2025 · The circuit in the picture with LM317 should provide 1A current, but it gives only 266 mA. What am I doing wrong? I have also attached LM317.asy and LM317.sub …
LM317 as a current limiter control - All About Circuits
Jan 5, 2025 · I've seen the circuit diagram (found on the web) part of a Li Ion battery charger attached and from what I understand, the second LM317 (CC) serves a current limiter. I would …
Voltage regulator with bypass MOSFET for more current
Jan 10, 2017 · The value of R3 determines the relative division of current between the MOSFET and the LM317. It does regulate the voltage, as shown by the V (out) voltage with change in …
LM317L constant current - All About Circuits
Mar 8, 2025 · The LM317 has about a 1.5V dropout voltage, so 3.3V input may not have enough headroom for the load. I'm not sure that the line transient response of the LM317 is going to …
LM317 - LM338, big voltage drop under load - All About Circuits
May 30, 2020 · LM317 and LM338 are easy to use and pretty straightforward devices for voltage regulation. LM338 is said to be able to supply 5A and LM317 more than 1A current. Just as an …
Alternative Transistors for LM317 High Current Voltage Regulator ...
Jun 20, 2017 · Hi, I am referring the below circuit diagram to make a High Current Linear Voltage Regulator circuit. This circuit is given in LM317's datasheet. I need...
What am I doing wrong with the lm317? - All About Circuits
Jan 3, 2023 · Hello. I have a very frustrating problem. Im using the lm317 voltage regulator to add adjustability to a fixed output power supply. I have used the lm317 numerous times over the …
LM317 tracking preregulator - All About Circuits
Dec 12, 2020 · I use a 30Vac transformer, which rectified and filtered is about 40-42Vdc and I need to reduce the voltage at the input of the LM317. Then using the transistors and the …