LM2940CT 5.0 PDF

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Package. 0˚C ≤ TJ ≤ ˚C LMCT LMCT LMCT LMCT TO LMCS LMCS The LMCT/NOPB is a positive Voltage Regulator features the ability to source 1A of output current with a dropout voltage of typically V and a. Pin 5 and 6 need to be tied together on PCB board (5) ESD rating is based on the human body model, pF discharged through LMCT/NOPB.

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What are the caps on the BS2P40 demo board? I accept the Terms and Coditions. Text in the Subject and Body of the message will be ignored. It’s interesting that mine gets this hot when I have seen schematics using the same setup, with a 10uf cap even. Please, log in or register. Be the first one to review this product.

LDO – LM2940CT-5.0

Write Your Own Review Only registered customers who has bought this product can write reviews. Hi John, What is the input voltage to the regulator — can you measure it?

You must have JavaScript enabled in your browser to utilize the functionality of this website. There is another possibility Did you take steps to obtain caps with appropriate ESR? Thanks, John In basicstamps yahoogroups.


Should I use some other voltage regulator? Furthermore, hidden in lm2940cg ap note the ones that I have seen is an admonition to have a minimum current load.

Your use of Yahoo! Larger values of output capacitance will give improved transient response.

The quiescent current with 1A of output current and an input-output differential of 5V is therefore only 30 mA. Many of the regulators require capacitance on the input and output to minimize oscillation. Quick Links Categories Recent Discussions.

I can’t find a schematic of it. During line transients, such as load dump when the input voltage can momentarily exceed the specified maximum operating volt-age, the km2940ct will automatically shut down to protect both the internal circuits and the load. Thank you for all the input. The acceptable range of ESR plotted versus load current is shown in the graph below.

Hello, All I have is a cap between the output and ground at 22uf. I have a 22uf cap between the output and ground as specified in the datasheet for stability. I will try it with the additional cap. Only registered customers who has bought this product can write reviews. Furthermore, a quiescent current reduction circuit has been included which reduces the ground current when the differential between the input volt-age and the output voltage exceeds approximately 3V. Another, does your LCD has backlights?


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LMCT-5 Datasheet

I believe the data sheets show a 0. Another data sheet says 0. My input is 9V, I’m using the power supply that came with the P40 demo board. Otherwise the output impedance is too high and it oscillates. 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.

Friday, December 05, Do you know about how much output current you have? Here’s a snip from p. Guess you like Empty. That would work alright.