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.

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The smallest difference between them can lead to problems, and they have to behave exactly the same across the whole temperature range.

IC 7805 (Voltage Regulator IC)

Trying to bin chips for this is a waste of time, and clearly not the way to go. Rather get another voltage regulator that can handle the current. In many applications, the higher noise, switching artifacts, and poorer regulation response make switchers a bad choice.

Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies. This difference between the input and output voltage is released as heat.

Voltage Regulator IC | Datasheet | Pin Diagram & Description

What is impact due to current in these cases 1. Olin Lathrop k 30 Switch mode supplies seem to have a lot of inertia, and people shy away from them. Circuit taken from here and there appear to be several variants of this on the web such as this: You used “might” three times.

Can I use two ICs in parallel to get double current capacity? However here is a way to effectively increase the current capability of eatasheet single linear regulator:. Does this IC boost voltage dwtasheet is voltage is less than 5?


The circuit in purple provides protection against overheating Q13excessive input voltage Q19 and excessive output current Q Sign up using Email and Password. Most linear regulators have only a series-pass transistor to feed current to the load. More tutorials available at learning resources.

All About IC 7805 | Voltage Regulator

So are they all doing it wrong? Let’s say the input voltage is only datasueet. The greater the difference between the input and output voltage, more the heat generated.

This amplified signal controls the output transistor through Q Peter Mortensen 1, 3 14 That times the 2. Yes, if you can find two “identical” ICs.

If you are going to be using a heatsink, better calculate the heatsink size properly. Perhaps an editor would clear this up. If we have a system with input 15 volts and output current required is.

LM Datasheet, PDF – Alldatasheet

That means the total linear regulator drops 3. 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. Spend the money that you would on heat sinks, increased assembly costs, and shipping on a better design, then you’re saving money every unit you make.

This also allows for lower valued resistors. The regulator still provides the regulation and acts as the voltage reference for the circuit to work.

Yes you can, however, you need to isolate them from each other which will lower the output by about. You can’t assume there can be two exactly identical chips. So, we now have 2 options. So twice the energy, that is actually utilized is wasted. Is it related to the error amplifier behind the FB pin? A ready-made, integrated switcher will stay cool and use less space.


I assume that means you don’t know but I hurt your feelings somehow in answering or commenting on some other question.

It is putting out 2. If you need that kind of current, linear regulators are usually not the answer, as they will dissipate quite a lot of heat. It’s best to use a larger regulator with higher capability.

I agree that it’s not a good idea, but the question was “will it work? Post as a guest Name. Please enter your comment! It is unwise to assume that because the current requirements are high, a switcher should be used. Or just build a little 5A switching regulator like this but make sure your target application doesn’t require a particularly low noise and low ripple voltage supply: It might shut down, it might gracefully reduce its output voltage.

Consider the power dissipated by this circuit, even in the best case scenario. Instead, the entire chip datashret the feedback loop.

If the question is “can I do that with any two equal s? Short story is that you can’t reliably or cleanly get twice the current from two paralleled voltage regulators that ostensibly produce the same output.