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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Larger values of output capacitance will give improved transient response. Just in case, lm29400ct-5 another one, nothing happened. Join Date Jul Posts 2, 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. Hello, All I have is a cap between the output and ground at 22uf. Thank you for all lm2940cct-5 input. The time now is Lm2940ctt-5 only things being powered in the circuit is the stamp and the LCD.
Let us know if this solves the problem? 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. Should I use some other voltage regulator?
Friday, December 05, I xatasheet experienced it personally, but you could have an issue there that might result in overheating. Furthermore, hidden in the ap note the ones that I have seen is an admonition to have a minimum current load.
Check your caps, it might be leaky.
It’s interesting that mine gets this hot when I have seen schematics using the same setup, with a 10uf cap even. Comments 10 Comments sorted by Date Added Votes.
It is essential that the xatasheet capacitor meet these requirements, or oscillations can result. Text in the Subject and Body of the message will be ignored. I thought that the LMCT5 was better than thebut is not.
Did you take steps to obtain caps with appropriate ESR? Do you know about how much output current you have? Another, does your LCD has backlights? Hi All, Dataxheet have a PIC application 16f88 and 2 leds that is working fine with a from National and a 6 volts 1 amper battery.
LM2940ct 5.0 gets HOT quick.
What are the caps on the BS2P40 demo board? Basic Stamp List Subject: I tried with another LMCT5 and got the same result.
Members who have read this thread: I measure the input and the output and seemed ok. 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 believe the data sheets show a 0. I cannot find out why is not working. Hi John, What is the input voltage to the regulator — can you measure it? Hi Daniel, Just checked the datasheet http: Hi danielhr77, Make sure dataasheet have enough capacitance fitted both before and after the regulator.
There is another possibility Any ideas why is not working with the LMCT5? Groups is subject to http: I switched back to the and everything worked again!!! I have a 22uf cap between the output and ground as specified in the datasheet for stability.
LM2940CT-5 PDF Datasheet浏览和下载
Sign In or Register to comment. Typically, LCD displays take very little, but I’m not familiar with the unit you’re using. Many of the regulators require capacitance on the input and output to minimize oscillation.
Check datasheet for correct smoothing and decoupling capacitance values. I will try it with the additional cap. The burn your finger kind of hot.
Another data sheet says 0. Regards, -Bruce tech at rentron.
LMCT-5 (ETC) PDF技术资料下载 LMCT-5 供应信息 IC Datasheet 数据表 (6/17 页)
Here’s a snip from datashret. Photos – easier uploading and sharing. The ESR of the output capacitor will cause loop instability if it is too high or too low. I like to put a led on the output for the minimum load, and to show, solidly, that power IS really on.