LM2940CT 5.0 PDF

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

I can’t find a schematic lm29400ct it. I accept the Terms and Coditions. I will try it with the additional cap. Quick Links Categories Recent Discussions. Many of the regulators require capacitance on the input and output to minimize oscillation.

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Otherwise the output impedance is too high and it oscillates. The acceptable range of Lm29940ct plotted versus load current is shown in the graph below.

That would work alright. My input is 9V, I’m using the power supply that came with the P40 demo board.

LM2940ct 5.0 gets HOT quick.

Forgot Password Login or registration. Another data sheet says 0. What are the caps 5.0 the BS2P40 demo board?

It is essential that the output capacitor meet these requirements, or oscillations can result. Larger values of output capacitance will give improved transient response.

LMCT-5 Datasheet

JavaScript seems to be disabled in your browser. Another, does your LCD has backlights? I have a 22uf cap between the output and ground as specified in the datasheet for stability. Photos – easier uploading and sharing.

Typically, LCD displays take very little, but I’m not familiar with the unit you’re using. Thank you for all the input.

Familiar regulator features such as short circuit and thermal overload protection are also provided. lk2940ct

Hello, All I have is a cap between the output and ground at 22uf. The power in Watts being dissipated within the regulator is the voltage drop across the regulator times the current passing through it. Sign In or Register to comment. Hi John, What is the input voltage to the regulator — can you measure it? The burn your finger kind of hot.


LDO – LM2940CT-5.0

Also, remember the more voltage you have to drop and the more current you want to pull, the hotter the device will run. Check your caps, it might be leaky. During line transients, such as load dump when the input voltage can momentarily exceed the specified maximum operating volt-age, the regulator will automatically shut down to lm2940vt both the internal circuits and the load.

The only things being powered in the circuit is the stamp and the LCD. You must have JavaScript enabled in your browser to utilize the functionality of this website.