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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The acceptable range of ESR plotted versus load current is shown in the graph below. Is ths just because of the load placed on it due to the lcd? Your use of Yahoo! Results 1 to 5 of 5.

I found a data sheet on the LM, and it datasueet like you need at least 22uF on the output, and drop-out will be around 0. Quick Links Categories Recent Discussions.

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. I tried with datasyeet LMCT5 and got the same result.

LM2940CT-5 PDF Datasheet浏览和下载

Check your caps, it might be leaky. Does it have a backlight?

Many of the regulators require capacitance on the input and output to minimize oscillation. Here’s a snip from p. Thank you for all the input. Join Date Jan Posts The only things being dxtasheet in the circuit is the stamp and the LCD. The ESR of the output capacitor will cause loop instability if it is too high or too low. Photos – easier uploading and sharing. Another data datahseet says 0.

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LMCT-5 Datasheet, PDF – Alldatasheet

I switched back to the and everything worked again!!! Regards, -Bruce tech at rentron.

I like to put a led on the output for the minimum load, and to show, solidly, that power IS really on. Text in the Subject and Body of the message will be ignored.

LM2940ct 5.0 gets HOT quick.

Keep in mind the adapter you have may be putting out more than 9 volts, or may not have a very clean output, dstasheet of which will make the regulator get hot. Hi All, I have a PIC application 16f88 lm290ct-5 2 leds that is working fine with a from National and a 6 volts 1 amper battery. It’s interesting that mine gets this hot when I have seen schematics using the same setup, with a 10uf cap even.

Did you take steps to obtain caps with appropriate ESR? Another, does your LCD has backlights? There is another possibility Basic Stamp List Subject: Check datasheet for correct smoothing and decoupling capacitance values. What are the caps on the BS2P40 demo board? The power darasheet Watts being dissipated within the regulator is the voltage drop across the regulator times the current passing through it.

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Any ideas why is dataeheet working with the LMCT5? Groups is subject to http: Join Date Jul Posts 2, Let us know if this solves the problem? If too little or none they can oscillate which may not show datashee your meter? I will try it with the additional cap. Just in case, tried another one, nothing happened. The LM gets hot after a few min which isn’t nice.

Furthermore, hidden in the ap note the ones that I have seen is an admonition to have a minimum current load.

LMCT-5 (ETC) PDF技术资料下载 LMCT-5 供应信息 IC Datasheet 数据表 (6/17 页)

My input is 9V, I’m using the power supply that came with the P40 demo board. Bob Edit oops Bruce has just giving this info. 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 lm2940ct–5.

Hi Daniel, Just checked the datasheet http: Hi danielhr77, Make sure you have enough capacitance fitted both before and after the regulator.

I cannot find out why is not working. Comments 10 Comments sorted by Date Added Votes.