Part Number: LM78L12, Maunfacturer: National Semiconductor, Part Family: LM, File type: PDF, Document: Datasheet – semiconductor. VOLTAGE REGULATOR. LM78L TO Lead Plastic Package. 2. It is recommended that you completely review our Data Sheet(s) so as to. LM78L12 Linear Voltage Regulators are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for LM78L12 Linear Voltage Regulators.

Author: Zumi Mazilkree
Country: Nepal
Language: English (Spanish)
Genre: Technology
Published (Last): 4 November 2004
Pages: 21
PDF File Size: 20.52 Mb
ePub File Size: 8.74 Mb
ISBN: 913-7-13172-130-3
Downloads: 20027
Price: Free* [*Free Regsitration Required]
Uploader: Zukora

Without the protection diode, an input short causes the input to rapidly approach ground potential, while the output remains near the initial VOUT because of the stored charge in the large output capacitor. If I remember right your job to checkthe 78xx series regulators are stable with 0 ESR output caps.

In that using a high current regulator like would be an ideal choice. The regulated 5V can be obtained from the output pin if the IC. The Fairchild datasheet is limited to just data, with minimal application guidance. dataaheet

LM78L12 datasheet, Pinout ,application circuits 3-Terminal Positive Regulators

Post as a guest Name. It really does not matter much. These regulators also have the ability to limit current and protect when the temperature exceeds beyond junction temperature. The 78L05 is a three terminal voltage regulator. Complete Technical Details can be found at the 78L05 datasheet given at the end of this page.

So you if connect high current loads then you can expect the IC to get very hot soon and shunt down eventually. Email Required, but never shown. Olin Lathrop k 30 Apart from using it as a voltage regulator it can also be used as a current regulator, short-circuit protector, booster circuit and even a variable voltage regulator. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.


Alternative Regulator for 78L I’m not sure those are exactly recommended values. But another manufacturer Texas Instruments have different C1 recommendation on their datasheet which is 0. A 0 impedance input voltage isn’t going to hurt the regulator. In fact, the lower the better. CI is required if regulator is located an appreciable distance from the power supply filter. From Texas Instruments datasheet:.

Of course there is no such thing, but some technologies, like ceramic, have low ESR with large enough values to be useful in this application. From Texas Instruments datasheet: But 1u already does the job of n. If the energy released by the capacitor is large enough, this diode, low current metal, and the regulator are destroyed.

LM and decoupling capacitor value Ask Question. On the output, TI states: So, if you are looking for a smaller package of voltage regulator that has small current datashset in TO package then this IC might be the right choice. No, I mean caps with 0 ESR.

So you are free to pick dataseet capacitors for input and output to reduce ripple, noise, etc. Another thing I never understood sometimes they put decoupling caps for power rails in parallel like 1u and n ect.


Voltage regulators are very common in electronic circuits. Although all the circuits in Fairchild data sheet show 0.

– H – 64 Page

Because the maximum current that this IC could supply is only upto mA. But, the IC suffers from heavy heat loss hence a Heat sink is recommended for projects that consume more current. But what if I use a single 0. 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. If needed, use 0.

LM78L12 Datasheet PDF

Trevor Oh never thought of it. You see them in parallel because different cap types have different high frequency characteristics. I have two questions: Ci can be as large as you want.

The three terminals are Input, Output and ground as shown in the 78L05 pinout diagram. LM voltage regulator is recommended to be used with decoupling capacitors at its input and output as in the below diagram:. Since adtasheet regulators protect themselves from output shorts, there is effectively no upper limit from the regulator’s point of view.

StainlessSteelRat 3, 6 And here is the part from the manufacturer Fairchild see recommended C1 is 0.

Posted in Sex