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.

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The Fairchild datasheet is limited to just data, with minimal application guidance. The output current of this IC can go up datassheet mA. When using large capacitors at the output of these regulators, a protection diode connected input to output Figure 15 may be required if the input is shorted to ground. But, the IC suffers from heavy heat loss hence a Heat sink is recommended for projects that consume more current.

And here is the part from the manufacturer Fairchild see recommended C1 is 0. Rather those are what THEY had on hand to build the test circuit with and tabulate the numbers. Another popular voltage regulator is which is bulkier in size but has high current rating of about 1A. Although all the circuits in Fairchild data sheet show 0.

The three terminals are Input, Output and ground as shown in the 78L05 pinout diagram. For C1, can I use these three caps in parallel as their sum is 0. So you are free to pick appropriate capacitors for input and output to reduce ripple, noise, etc. But what if I use a single 0.


I have two questions: Did I get you correct? Home Questions Tags Users Unanswered. I’m not sure those are exactly recommended values. The capacitor will then discharge through a large internal input to output diode and parasitic transistors.

In the circuit below a input voltage of 12V is regulated to 5V using the 78L LM and decoupling capacitor value Ask Question. In our case the 78L05 IC is an iconic regulator IC that finds its application in most of the projects.

But another manufacturer Texas Instruments have different C1 recommendation on their datasheet which is 0. You mean tantalum type?


Olin Lathrop k 30 If needed, use 0. Email Required, but never shown. They provide a constant output voltage for datasheft varied input voltage. The 78L05 is a three terminal voltage regulator. Better than 3 capacitors in parallel.

LM78L12 Datasheet PDF – Bay Linear

Do you have any idea about it? Sign up using Email and Password. Paralelling is a little less common these days since you can get some pretty large value ceramics nowadays. 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. CI is required if regulator is located an appreciable distance from the power supply filter.


Some low ESR caps in parallel with some bulk 10uF caps won’t hurt. No, I mean caps with 0 ESR. It really does not matter much. Because the maximum current that this IC could supply is only upto mA. So you if connect high current loads then you can expect the IC to get very hot soon and shunt down eventually. As the TI datasheet says 0. You have to look elsewhere in the datasheet to find the min and max allowed values.

Those values are really the recommended minimums. What you quote doesn’t say what Co needs to be, only what value the rest of the specs are for.

3-Terminal Positive Regulators

The fast diode in Figure 15 shunts most of the capacitors discharge current around the regulator. Of course datsheet is no such thing, but some technologies, like ceramic, have low ESR with large enough values to be useful in this application. Trevor Oh never thought of it. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Datasheeet of Service. But 1u already does the job of n. So, if you are looking for a smaller package of voltage regulator that has small current rating in TO package then this IC might be the right choice.