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 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 …
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 …
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 …
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 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 …
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 …
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...
Constant Current Constant Voltage Battery Charger - All About …
Nov 19, 2024 · The charging mechanism should be CC then CV during the end of the charging. I'm using LM317 component to achieve constant current source circuit. TL431A acts a …
LM317 Voltage Drop (IN>Out) Vs Efficiency - All About Circuits
Jan 17, 2009 · Hi Rardi, Sadly, the LM317 is not very energy efficient. It makes for a very simple solution for linear current or voltage regulators, but it is actually very wasteful in terms of power …