·Output current in excess of A. ·Output voltage of 12V. ·Internal thermal overload protection. ·Output transition Safe-Area compensation. ABSOLUTE. The L series of three-terminal positive regulators is available in TO, TO- FP, TO-3 and D2PAK packages and several fixed output voltages, making it. LM datasheet, LM pdf, LM data sheet, datasheet, data sheet, pdf, BayLinear, A Positive Voltage Regulator.

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There’s no sense in trying to get closer than that. LM voltage regulator is recommended to be used with decoupling capacitors at its input and output as in the below diagram: Sign up using Facebook. No, I mean caps with 0 ESR. Since these regulators protect themselves from output shorts, there is effectively no upper limit from the regulator’s point of view. A 0 impedance input voltage isn’t going to hurt the regulator.

LM Datasheet Fairchild pdf data sheet FREE from

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.

You mean tantalum type? You see them in parallel because different cap types have different high frequency characteristics. 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. But another manufacturer Texas Instruments have different C1 recommendation on their datasheet which is 0. Those values are really the recommended minimums.


LM and decoupling capacitor value Ask Question. If needed, use 0. It really does not matter much. If the energy released by the capacitor is large enough, this diode, low current metal, and the regulator are destroyed. 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 1u already does the job of n.

Olin Lathrop k 30 You have to look elsewhere in the datasheet to find the min and max allowed values. Another thing I never understood sometimes they put decoupling caps for power rails in parallel like 1u and n ect.

Rather those are what THEY had on hand to build the test circuit with and tabulate the numbers. Sign up using Email and Password. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.


I’m not sure those are exactly recommended values. Did I get you correct? Trevor Oh never thought of it. But what if I use a single 0.

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So you are free to pick appropriate capacitors for input and output to reduce ripple, noise, etc. The fast diode in Figure 15 shunts most lj7812 the capacitors discharge current around the regulator. Paralelling is a little less common these days since you can get some pretty large value ceramics nowadays.

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

Do you have any idea about it?

And here is the part from the manufacturer Fairchild see recommended C1 is 0. On the output, TI states: Better than 3 capacitors in parallel. Email Required, but never shown. lm712