LM2940CT-5 DATASHEET PDF

LMCT/NOPB Texas Instruments LDO Voltage Regulators 1A LDO REG datasheet, inventory, & pricing. 1A LDO REG. Datasheet: . Documents (5). Low drop-out voltage regulator. Order code. Manufacturer code. Description. LMCT LMCT-5 1A REGULATOR (RC). LMCT-5 -. The LM/LMC positive voltage regulator features the ability to source 1A of output current with a dropout voltage of typically V and a .

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Results 1 to 5 of 5. I have a 22uf cap between the output and ground as specified in the datasheet for stability. If you aren’t running very much current, and your Vin isn’t too high, a small clip-on heat sink can significantly reduce the regulator’s temperature. The power in Watts being dissipated within the regulator is the voltage drop across the regulator times the current passing through it. I cannot find out why is not working. The burn your finger kind of hot.

Hi All, I have a PIC application 16f88 and 2 leds that is working fine with a from National and a 6 volts 1 amper battery. Larger values of output capacitance will give improved transient response. Bob Edit oops Bruce has just giving this info. It is essential that the output capacitor meet these requirements, or oscillations can result.

Check datasheet for correct smoothing and decoupling capacitance values. Photos – easier uploading and sharing. The time now is Text in the Subject and Body of the message will be ignored.

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I can’t find a schematic of it. Does it have a backlight? I couldn’t find a datasheet for the LMCT5, but, some LDO types require specific capacitor values on the output or they will oscillate, and that causes major problems. Do you know about how much output current you have?

I measure the input and the output and seemed ok. If too little or none they can oscillate which may not show on your meter? Hi Daniel, Just checked the datasheet http: Hi John, What is the input voltage to the regulator — can you measure it?

Is ths just because of the load placed on it due to the lcd? That would work alright. I switched back to the and everything worked again!!!

LM2940CT-5 PDF Datasheet浏览和下载

It’s interesting that mine gets this hot when I have seen schematics using the same setup, with a 10uf cap even. Join Date Jan Posts Thank you for all the input. The only things being powered in the circuit is the stamp and the LCD.

Did you take steps to obtain caps with appropriate ESR? Here’s datashet snip from p. The acceptable range of ESR plotted versus load current is shown in the graph below. I haven’t experienced it personally, but you could have an issue there that might result in overheating. Basic Stamp List Subject: Your use of Yahoo! Regards, -Bruce tech at rentron.

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LMCT-5 Datasheet, PDF – Alldatasheet

Check your caps, it might be leaky. Otherwise the output impedance is too high and it oscillates. Any ideas why is not working with the LMCT5? I will lm2940cf-5 it with the additional cap. The LM gets hot after a few min which isn’t nice.

Groups is subject to http: I believe the data sheets show a 0. Hello, All I have is a cap between the output and ground at 22uf. Should I use some other voltage regulator?

Also, remember the more voltage you have to drop and the more current you want to pull, the hotter the device will run.

Sign In or Register to comment. Members who have read this thread: Another data sheet says 0. Similar Threads Program works fine alone but not as part of a larger program. 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. Let us know if this solves the problem?

Lm2940xt-5 danielhr77, Make sure you have enough capacitance fitted both before and after the regulator.