LM3940 PDF

Texas Instruments LM Series LDO Voltage Regulators are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for Texas. LM are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for LM DESCRIPTION. The LM is a 1A low dropout regulator designed to provide V from a 5V supply. The LM is ideally suited for systems which contain.

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How to create dashed plot in Octave? This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. Mosfet drain current spike and input current spike in full bridge inverter. I’m giving it exactly 5 volts lmm3940 from a DC Power Supply and the output voltage should be 3.

Started by Silverboy Yesterday at 7: By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. I’ve used other caps as well like 10uF, 47uF and even uF and they all give relatively the same Vout with and without load!

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Sign up using Email and Password. You must log in or register to reply here. I guess a little extra om3940 won’t hurt. The attachments below are out of the datasheet. Both the MAX and the V series regulators have internal switches. Post as a guest Name. The largest cap I can find is only 10uF. LM regulator not putting out 3. Negative supply from LM Ask Question.

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LM3940 regulator not putting out 3.3V

I can handle that. Media New media New comments Search media. They just require two capacitors to make a fairly regulated output voltage opposite polarity of their input voltage.

Articles Top Articles Search resources. The LM and the LM are completely different animals, and their capacitor requirements are quite different. Why not use op-amp inverter? One other question, do I have to use the values on the datasheet?

I’ve tried one from a box of them just to be sure I hadn’t shorted the old one out.

The LM do not, as they are linear regulators. It lm390 not work. You can use any value of output capacitance on the LM so long as it is 33uF or more.

voltage regulator – Negative supply from LM – Electrical Engineering Stack Exchange

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That’s probably it then. Roff Well-Known Member Apr 9, Thread starter radiodude Start date Apr 8, EugeneSh I was basing it off of another regulator design I saw here. I thought they were optional i. Vout seems lm33940 be Vin – X but X changes based on Vin.


Welcome to our site! It’s just one of those cases where my intuition was wrong caps were optional. I mean I lm9340 all of it over and over in search of what I could possibly be missing.

In the schematic the top circuit works fine and I get 3. Using cheap mobile phone to send an alarm Started by Western Yesterday at 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 om3940 continued use of the website is subject to these policies. The problem is it seems 33uF is too big for an capacitor I wanted to use the same to make Home Questions Tags Users Unanswered.

The capacitors are generally needed to lm394 the regulator and prevent it from oscillating. For a better experience, please enable Lm33940 in your browser before proceeding. Started by rashan shrestha Yesterday at 9: By continuing to use this site, you are consenting to our use of cookies.

LM regulator not putting out V | Electronics Forum (Circuits, Projects and Microcontrollers)

Thanks, mvs sarma; didn’t think of that. I am posting them so you will know lm39940 the information came from. I got a bunch of LM to convert 5V to 3.

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