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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Another data sheet says 0. It is essential that the output capacitor meet these requirements, or oscillations can result. Did you take steps to obtain caps with appropriate ESR? Any ideas why is not working with the LMCT5?

Thank you for all the input. I thought that the LMCT5 was better than thebut is not. 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.

The burn your finger kind of hot. I measure the input and the output and seemed ok. I tried with another LMCT5 and got the same result. Sign In or Register to comment. Regards, -Bruce tech at rentron. Hi John, What is the input voltage to the regulator — can you measure it?

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

What are the caps on the BS2P40 demo board? Join Date Jan Posts l2940ct-5 Do you know about how much output current you have? Furthermore, hidden in the ap note the ones that I have seen is an admonition to have a minimum current load.

Here’s a snip from p. The LM gets hot after a few min which isn’t nice. Hello, All I have is a cap between the output and ground at 22uf.

LM2940ct 5.0 gets HOT quick.

Just in case, tried another one, nothing happened. Members who have read this thread: Does it have a backlight? Groups is subject to http: 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. Many of the regulators require capacitance on the input and output to minimize oscillation. My input is 9V, I’m using the power supply that came with the P40 demo board. Photos – easier uploading lm29940ct-5 sharing.

Otherwise the output impedance is too high and it oscillates. Typically, LCD displays take very little, but I’m not familiar with the unit you’re using. I switched back to the and everything worked again!!! 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.

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I haven’t experienced eatasheet personally, but you could have an issue there that might result in overheating. Should I use some other voltage regulator?

LM2940CT-5 PDF Datasheet浏览和下载

Similar Threads Program works fine alone but not as part of a larger program. Quick Links Categories Recent Discussions. Friday, December 05, Your use of Yahoo!

I can’t find a schematic of it. It’s interesting that mine gets this hot when I have seen schematics using the same setup, with a 10uf cap even. I found a data sheet on the LM, and it looks like you need at least 22uF on the output, and drop-out will be around 0.

The acceptable range of ESR plotted versus load current is shown in the graph below. The time now is Thanks, John In basicstamps yahoogroups. Bob Edit oops Bruce has just giving this info. Check your caps, it might be leaky. Comments 10 Comments sorted by Date Added Votes.