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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I’m not sure those are exactly recommended values. So you are free to pick appropriate capacitors for input and output to datashete ripple, noise, etc. Sign up using Facebook.

Did I get you correct? You have to look elsewhere in the datasheet to find the min and max allowed values.

LM78L12 Datasheet

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. Sign up or log in Sign up using Google. Olin Lathrop k 30 These regulators also have the ability to limit current and protect when the temperature exceeds beyond junction temperature.

Also note the Capacitors C1 and C2 are used at both the Input and output end. Home Questions Tags Users Unanswered.

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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. The fast diode in Figure 15 shunts most of the capacitors discharge current around the regulator.

The only real limitation is therefore the initial surge current as the output cap is charged up. Post as a guest Name. 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 dafasheet subject to these policies.

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Trevor Oh never thought of it. But another manufacturer Texas Instruments have different Adtasheet recommendation on their datasheet which is 0. From Texas Instruments datasheet:. What you quote doesn’t say what Co needs to be, only what value the rest of the specs are for. Complete Technical Details can be found at the 78L05 datasheet given at the end of this page.

In fact, the lower the better. You see them in parallel because different cap types have different high frequency characteristics.

And here is the part from the manufacturer Fairchild see recommended C1 is 0. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

On the output, TI states: Another popular voltage regulator is which is bulkier in size but has high current rating of about 1A. If the energy released by the capacitor is large enough, this diode, low current metal, and the regulator are destroyed.


The output current of this IC can go up to mA.

StainlessSteelRat 3, 6 Better than 3 capacitors in parallel. Paralelling is a little less common these days since you can get some pretty large value ceramics nowadays.

For C1, can I use these three caps in parallel as their sum is 0. Because the maximum current that this IC could supply is only upto mA. In the circuit below a input voltage of 12V is regulated to 5V using the 78L Ci can be as large as you want. Trevor I put 0. The 78L05 is a three terminal voltage regulator. If needed, use 0. Although all the circuits in Fairchild data sheet show 0. Daatasheet have two questions: Lk78l12 to use 78L You mean tantalum type? Of course there is no such thing, but some technologies, like ceramic, have low ESR with large dagasheet values to be useful in this application.