An IMPORTANT NOTICE at the end of this data sheet addresses availability, . Changed all text, tables and graphics to match the new data sheet template. LM Datasheet, LM PDF, LM Data sheet, LM manual, LM pdf, LM, datenblatt, Electronics LM, alldatasheet, free, datasheet. VOUT = 10V. PRELOAD = mA. OBSOLETE PRODUCT. DATA SHEET FOR REFERENCE ONLY. Consult for possible alternate source.

Author: Zum Kagalar
Country: Egypt
Language: English (Spanish)
Genre: Science
Published (Last): 18 October 2010
Pages: 71
PDF File Size: 11.9 Mb
ePub File Size: 13.74 Mb
ISBN: 793-8-27456-688-4
Downloads: 4161
Price: Free* [*Free Regsitration Required]
Uploader: Meztijar

Either design your circuit so that the input voltage going into the regulator is limited to volts above the output regulated voltage or place an appropriate heatsink, that can efficiently dissipate heat. The greater the difference between the input and output voltage, more the heat generated. Misunderstood 5, 1 5 TI, in current literature says they “employ internal current-limiting, thermal shutdown and safe-area compensation, making them essentially indestructible.

Monday, December 31, For crucial applications, the parts can be tested datassheet binned to use parts that are closer together.

IC 7805 (Voltage Regulator IC)

OP says nothing about the nature of the load, so that’s his problem. It’s true one of them will do most of the work, and would be more likely to fail than the other after months or yearsbut I assume your question relates to using up parts on hand rather than a production design.

Hope it suits your requirements. Thank you for clear explanation! That can probably be handled just by good part choice and placement without explicit heat sinking or forced air cooling.


It may have something to do with that walls of text aren’t nice to read. I’ve seen it work. So are they all doing it wrong? When the current builds up to around mA, there will be enough voltage across R1 to start turning on Q1. Is it related to the error amplifier behind the FB pin? The voltage regulator produces constant output voltage of 5v with operating range input of v. You can include diodes on each to protect them, but still they will not share the load evenly.

Lm0785 is no reason to do something unusual, large, expensive and all around klunky, as a linear regulator that dissipates 10 W even with optimal lm77085 voltage.

On the other hand, if 9V is given as input at the same amount of load:. Instead, the entire chip becomes the feedback loop.

What is impact due to current in these cases 1. It is putting out 2.

If you are going to be using a heatsink, better calculate the heatsink size properly. The second half of this doesn’t make any sense at all. Could you please explain a bit more, why the loosing regulator does not generate current?

lm datasheet & applicatoin notes – Datasheet Archive

Here is a selection of switching converters ml7085 5V, A output. We have no information that the output voltage needs to be extra quiet.

As others have already said, paralleling multiple linear voltage regulators is a bad idea. Let’s say the input voltage is only 8. You have entered an incorrect email address!


I have used a full bridge rectifier along wd a transformer i tried to connect. So twice the energy, that is actually utilized is wasted. With two voltage regulators in parallel, one might want to naturally produce 4. The smallest difference between them can lead to problems, and they have to behave exactly the same across the whole temperature range.

Consider the power dissipated datashfet this circuit, even in the best case scenario. A resource for professional design engineers. Yes, if you can find datahseet “identical” ICs. This pin is neutral for equally the input and output. OP, the regulator outputs may not be exactly matched, so the current draw will typically not be shared equally.

When the ICs were introduced, the advertising called them “blowout proof,” meaning they would not be damaged by a short circuit and would turn off if they got too hot. If the output voltage is datashert 5Vthen the voltage divider provides 3. The regulator now needs to pass less current itself.

From the voltage and current I assume something like a single board computer or a board with lots of logic. Switch mode supplies seem to have a lot of inertia, and people shy away from them.