The LD is a series of low dropout positive voltage regulators The LD series includes a current limiting circuit and a trimmed band-gap reference. LDV 5a Low Drop Positive Voltage Regulator Adjustable And Fixed 5A LOW DROP POSITIVE Details, datasheet, quote on part number: LDV. The LD is a LOW DROP Voltage Regulator able to provide up to 5A of Output Current. Dropout is guaranteed at a maximum of V at the maximum output.

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I have a half-dozen PC power supplies with that chip I’m figuring out how to mod, but haven’t had time to dig any deeper. I was looking at the LD Datasheet: So the 12V output should put out 18V.

Vo is the maximum, R2 will be the potentiometer.

ST Microelectronics

Modding the psu is a good idea. And it gets worse if you mod the PC supply to put out, for instance in my case 18V in order to get at least 15V at the highest point: I’m not sure yet if it is really checking each one, or just feeding them all into a voltage divider so if any one output goes dead, it shuts down. It would be cool to be able to get v out of it.

Test equipment, replica and original sci fi props and costume pieces, and whatever else I feel like at the time. The design was straight from the manufacturers datasheet. How would I go about boosting the available voltage? Back inI built a “very linear” based bench power supply using a junkbox datasbeet transformer from my stash and a handful of parts. I have an Ultimaker and a 3D engraver. Do you -really- need 0V output? So what does all this mean. This is giving me the impetus to work on this project again.


Quite datasehet lot of heat.

STMicroelectronics LDV – PDF Datasheet – Linear Voltage Regulators In Stock |

Worst case, 5A 1. Build the reference design from the datasheet or sadly, since the LDadj does not really have a nice reference design like the LM, use the datasheet as a guideline. Try googling for “FSP ” without the quotes. I’m in the process of modifying a PC power supply so that it puts out about 18V from the 12V output.

Then the power supply should boost the PWM so that the 3. Keep in mind, an unmodified PC power supply regulates the 3. Panici Full Member Posts: For mine, I’m going to do some tests with a few heat sinks, with a small fan for forced air cooling. So I’ll need to spoof the other outputs back to the chip. If it is a TL, it is quite a bit simpler as ld1084f chip has been around for a very long time and is well documented.

LD1084V Datasheet PDF

I really, really hate having a “coarse” and dxtasheet control, that is the mark of a cheap POS power supply. You will need to determine which control IC is on the board and let us know.


That regulator requires 1. Newer power supplies regulate 3. I use a small finned sink and the metal case for cooling.

LDV 데이터시트(PDF) – STMicroelectronics

This prevents a situation happening where the output pin has a greater voltage on it than the input pin. For any voltage lower, use an lm or a switching reg, you could use a pass transistor and pass control of the regulated output to a transistor unless it’s a switching reg.

See page 6 of the datasheet. I am going to use the same linear regulator, and use 10 turn potentiometers to adjust voltage and maximum current. The only expensive item was a 5K ohm 10 turn potentiometer for voltage adjustment.

Working with adjustable voltage regulators. I’ve never worked with adjustable voltage regulators before, what supporting datashewt will I need to make this work?

Possible if you have an outside extra capacitance connected to the power supply, via some external circuit or you are experimenting with supercaps, and you turn the power supply off. But if you can’t, leave the 12v rail as it is power directly from it for 12v applications. Also, move the higher current shottky rectifiers to the 12V output.