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I do not have oscilloscope (to see ripple after the build), I have a linear transformer as power source and I do not want to oscillation ripple output. So that I want to conform from simulation.Rather than SIMULATING these Circuits, Why don't you just BUILD THEM?
Just using the LM317, It Will EASILY Charge up a 1,000uF Capacitor, or even a 10,000uF Cap.
Why the Additional Transistor?
How Much Current do you need.
Hi chemelec,Willen..........Regardless of doing a SIMULATION, you may still have oscillations in the Real Circuit.
A Simulation does not consider Ground Loops as can happen in Real Circuits.
Why not build up a LM723 Regulator circuit?
You can get both Voltage and Current Regulation, as well as a Good Low Noise Output.
Curious, What is the Voltage and Current Rating on your Transformer?
I crossed 27 years of age and TILL NOW I never been there in Kathmandu (our capital city). I studied in the eastern part of Nepal and completed university, though work never pushed me there to Kathmandu. Thousands of 'common parts' (for Canadian people) are 'rare parts' for Nepalese. As I know the small suppliers there in Kathmandu do not ship there product as home delivery. I just heard few shops of cloths or vegetables are starting to deliver their products to customers' house recent days, but just within the Kathmandu city. I am surviving 500km far east.With 24 Volts @ 2 Amps Out from the transformer, you will Only get a regulated Supply Output of Just ONE AMP.
So there is no point to building that 6 amp regulator.
And an LM723 is a Common, but Older Part.
It should be easy to get one, Even in your country.
Probably a supplier in Kathmandu
Or just use the LM317 Without the added Transistor.
HiTo help understand LM317 , I made a simplified equivalent circuit. that you can change at will , (enable) JAVA in browser.
View attachment 95645
I did not add bypass current booster but that can easily be done using PNP or Pch FET so that current sense biases the bypass switch.
The 16V input is an ideal source with a switch add +/-2V of ripple or sag. I chose 0.1Hz but it could be 100Hz just to show effect of dropout when Vin-out<2V or so.
I chose fixed values of hFE, so they are shown as ideal transistors not real.
RED parts dissipate heat.
Any questions for the forum?
Tony