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’d go with the application information as indicated by the TI datasheet.

In the circuit below a input voltage of 12V is regulated to 5V using the 78L Trevor Oh never thought of it. Trevor I put 0.

LM78L12 +12v Voltage Regulator IC

It is very easy and straight forward to use this IC, just connect the input in to the input voltage which has to be regulated and the ground pin to system ground. These regulators also have the ability to limit current and protect when the temperature exceeds beyond junction temperature. Rather those are what THEY had on hand to build the test circuit with and tabulate the numbers.

If I remember right your job to checkthe 78xx series regulators are stable with 0 ESR output caps. LM voltage regulator is recommended to be used with decoupling capacitors at its input and output as lm78l2 the below diagram: Without the protection diode, an input short causes the input to rapidly approach eatasheet potential, while the output remains near the initial VOUT because of the stored charge in the large output capacitor. If the energy released by the capacitor is large enough, this diode, low current metal, and the regulator are destroyed.


The regulated 5V can be obtained from the output pin if the IC. Although all the circuits in Fairchild data sheet show 0. Home Questions Tags Users Unanswered. I’m not sure those are exactly recommended values.

LM78L12 +12v Voltage Regulator IC | NightFire Electronics LLC

From Texas Instruments datasheet: LM and decoupling capacitor value Ask Question. Those values are really the recommended minimums.

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. Some low ESR caps in parallel with some bulk 10uF caps won’t hurt. But 1u already does the job of n. How to use 78L Since these regulators protect themselves from output shorts, there is effectively no upper limit from the regulator’s point of view.

But, the IC suffers from heavy heat loss hence a Heat sink is recommended for projects that consume more current.

The 78L05 is a three terminal voltage regulator. But what if I use a single 0. Another popular voltage regulator is which is bulkier in size but has high current rating of about 1A. Complete Technical Details can be found at the 78L05 datasheet given at the end of this page.


What you quote doesn’t lm788l12 what Co needs to be, only what value the rest of the specs are for. Do you have any idea about it?

Sign up using Email and Password. The fast diode in Figure 15 shunts most of the capacitors discharge current around the regulator. If the device is more than six inches from the input filter capacitors, an input bypass capacitor, 0. Better than 3 capacitors in parallel. Ci can be as large as you want.

LM voltage regulator is recommended to be used with decoupling capacitors at its input and output as in the below diagram:. Email Required, but never shown. There’s no sense in trying to get closer than that.

Another thing I never understood sometimes they put decoupling caps for power rails in parallel like 1u and n ect.

Did I get you correct? And here is the part from the manufacturer Fairchild see recommended C1 is 0. It really does not matter much. 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. Voltage regulators are very common in electronic circuits.