LMCT-5 Datasheet, LM 5V Low Dropout Voltage Regulator Datasheet, buy LMCT Pin 5 and 6 need to be tied together on PCB board (5) ESD rating is based on the human body model, pF discharged LMCT/NOPB .. in TI data books or data sheets is permissible only if reproduction is without alteration. Digi-Key Part Number, LMCT/NOPB-ND. Copy LMCT/NOPB- ND. Quantity Datasheets, LMN, C Datasheet. Design Resources.

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Even linear regulators are switching devices, which generate some noise that must be filtered.

Another data sheet says 0. The battery is a little over 9V. The power in Watts being dissipated within the regulator is the voltage drop across the regulator times the current passing through it. OK – I see the third line info now!

LMCT/NOPB Datasheet(PDF) – TI store

I picked up some 5V 1A voltage regulators at a shop in town. Thank you for all the input. Is ths just because of the load placed on it due to the lcd? Check your caps, it might be leaky. Many dxtasheet the regulators require capacitance on the input and output to minimize oscillation. I believe the data sheets show a 0. Photos – easier uploading and sharing. Thanks, John In basicstamps yahoogroups. The number after the hyphen is the regulated output voltage and the input voltage must be somewhat higher.

km2940ct-5.0 There is another possibility Hi John, What is the input voltage to the regulator — can you measure it? Now that I look at it again, it seems that the markings on the package don’t match up with the datasheet.


I went digging through my dad’s old junk box and found a 16V, uF electrolytic cap. It is essential that the output capacitor meet these requirements, or oscillations can result. I wonder if this daatsheet pose a problem. Here’s a snip from p. It’s a 3-pin TO package. My camera had a hard time catching the writing so I’ve added labels so you can see what’s printed on it.

lmct P datasheet & applicatoin notes – Datasheet Archive

I wonder if anyone knows if the capacitors have any effect beyond smoothing out ripple. Hello, All I have is a cap between the output and ground at 22uf. If you look at the diagram on the first datasheeet you will see some asterisks next to the capacitors.

I haven’t experienced it personally, but you could have an issue there that might result in overheating. Larger values of output capacitance will give improved transient response.

I like to put a led on the output for the minimum load, and to show, solidly, that power IS really on.

Furthermore, hidden in the ap note the ones that I have seen is an admonition to have a minimum current load. The only things dstasheet powered in the circuit is the stamp and the LCD. Keep in mind the adapter you have may be putting out more than 9 volts, or may not have a very clean output, both of which will make the regulator get hot.


Osgeld Faraday Member Posts: How’s that for redundancy? Sign In or Register to comment. Can you let us know what is dqtasheet on the third line?

LM2940ct 5.0 gets HOT quick.

Voltage regulator not working as expected. Mine is unfortunately putting out more than 5V, which defeats the purpose of having a regulator.

The acceptable range of ESR plotted versus load current is shown in the graph below. The ESR of the output capacitor will cause loop instability if it is too high or too low.

Datasheet says left pin is input, datsheet it’s labelled Text in the Subject and Body of the message will be ignored. The key phrase is: The circuit I’m building works fine with a 5V regulated supply one you plug into the wallbut I’d like to expand the design to work off of batteries as well.

If I hook up another 9V in parallel to add more currentit suddenly jumps dwtasheet around 7V which I would expect if it were in series, but it’s not. Groups is subject to http: Quick Links Categories Recent Discussions. I will try it with the additional cap. I’m pretty sure Cap value correlates to the noise frequency, so no, you can’t just “go over” the value and still have the same effect.

Datasgeet it have a backlight? Should I use ml2940ct-5.0 other voltage regulator? Further reading of the spec sheet yields