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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Modding the psu is a good idea. Back inI built a “very linear” based bench power supply using a junkbox 30V transformer from my stash and a handful of parts.

ST Microelectronics – datasheet pdf

Not sure about this series of chip, but the LM and LM78xx regulators can be damaged by this. If it is labeled “”, it gets more complex. I have an Ultimaker and a 3D engraver. Working with adjustable voltage regulators. For mine, I’m going to do some tests with a few heat sinks, with a small fan for forced air cooling.

ST Microelectronics

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. The minimum output is 1. See page 6 of the datasheet. I’m in the process of modifying a PC power supply so that it puts out datashfet 18V from the 12V output.


LDV 데이터시트(PDF) – STMicroelectronics

Panici Full Member Posts: Quite a lot of heat. The design was straight from the manufacturers datasheet. 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.

It would be cool to be able to get v out of it. For any voltage lower, use an lm or a ldd1084v reg, you could use a pass transistor and pass datawheet of the regulated output to a transistor unless it’s a switching reg.

LD1084V Datasheet

Thanks for the advice guys. The only expensive item was a 5K ohm 10 turn potentiometer for voltage adjustment. Also, move the higher current dataasheet rectifiers to the 12V output.

How would I go about boosting the available voltage? This prevents a situation ld0184v where the output pin has a greater voltage on it than the input pin.

So what does all this mean. This is giving me the impetus to work on this project again.

I’ve never worked with adjustable voltage regulators before, what supporting circuitry will I need to make this work? If it is dahasheet TL, it is quite a bit simpler as that chip has been around for a very long time and is well documented. I really, really hate having a “coarse” and “fine” control, that is the mark of a cheap POS power supply.


So put a load of about mA to mA on the 3. My plan is to rewire it so that the 3. So the 12V output should put out 18V. Oh, and a huge heat sink.

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. I use a small finned sink and the metal case for cooling.

Test equipment, replica and original sci fi props and costume pieces, and whatever else I feel like at the time. 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: Newer power supplies regulate 3. I am going to use the same linear regulator, dafasheet use 10 turn potentiometers to adjust voltage and maximum current.

But if you can’t, leave the 12v rail as it is power directly from it for 12v applications. Making a switching regulator to cover that wide an output range could be interesting.