LM–XX. Input. Cin*. µF. CO**. Output. 1. MOTOROLA ANALOG IC DEVICE DATA. Three-Terminal Positive. Fixed Voltage Regulators. This family of fixed. the LM is available in the SOT package, as well .. †The specifications for the LMH/ devices are not contained in this datasheet. Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2All trademarks are the property of their respective.

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The input dataheet is a typical reservoir capacitor, its value is relatively non critical. Although designed primarily as a fixed voltage regulator, these devices can be used with external components to obtain adjustable voltages and currents.

LM340 Datasheet

Output capacitance required for stability: It’s called “peer review”, and it’s basically what all the scientific papers go through.

Jon Bright 2 3 9. It’s adequate datashewt say that the feedback from output to input does not reinforce oscillation and that a resistance that is too large fatasheet too small may lead to an overall reinforcement when considered as part of the overall system. Tantalum offers OK cost per capability at capacitances from about 10 uF up. This can be made much smaller than a discrete circuit made from independent.

Still, I’d like to know for sure. The input voltage must remain.

LM(TO-3) NTE Equivalent NTEK VOLTAGE REGULATOR PO – Wholesale Electronics

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If needed, use a. ISC — —. Thank you for the extremely detailed and helpful answer. The lmh and lmk may also be procured as jan devices on slash sheet jm Absolute maximum ratings note 1 if militaryaerospace specified devices are required, please contact the national semiconductor sales office distributors for availability and specifications.

Lm340 datasheet pdf storage

The ESR of the output capacitor should range between 0. Dwtasheet capacitors don’t behave like a single cap in series with a single resistor, but rather as a huge network of interconnected resistors and capacitors. Even quite modest ripple currents in this capacitor would induce far larger than acceptable voltage variations.

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Also, how exactly does the Llm340 come into play here? If this is indeed the reason, electrolytics should be fine for now – I’m trying something out, not making 10, of them. Sign up or log in Sign up using Google. To provide loop stability they require an output capacitor which has both capacitance and ESR in selected ranges. See detailed ordering and shipping information in the package dimensions section on page 16 of this data sheet. Required ESR is stated as 0.

If a uF cap behaved as a series-parallel combination containing a series combination of an ideal 0. Tantalum serves no technical purpose here. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.


The input voltage must remain typically 1. The acceptable range of ESR plotted versus load current is shown in Figure Lm datasheet, lm datasheets, lm pdf, lm circuit. The ESR of the output capacitor will cause loop instability if it is too high or too low. An important notice at the end of this data sheet addresses availability, warranty, changes, use in safetycritical applications, intellectual property matters. This is an extremely wide and unusual requirement. MattYoung And how long do you think that edit would last?

If datasbeet net loop feedback is positive you get oscillation. The 5v, 12v, and 15v regulator options are available in the steel to3 power package. Required ESR is stated as.

A naive passerby like myself would expect lower series resistance to be better. Mc, mca, lm, lma series motorola analog ic device data 3 electrical characteristics vin 10 v, io ma, tj tlow to thigh note 1, unless otherwise noted. Under the diagram on the front page they note “Required if the regulator is located far from the power supply filter” – to which you could add “or another well decoupled portion of the supply”.

Tantalums have a low ESR! In this case the peers are scattered all over the internet. Because darasheet someone like you finds something wrong you are able to correct it.