LM2940CT 5.0 PDF

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What are the caps on the BS2P40 demo board? Further reading of the spec sheet yields The only things being powered in the circuit is the stamp and the LCD. Hello, All I lmct The burn your finger kind of ddatasheet. Thanks, John In basicstamps yahoogroups.

According to the diagram Input is on the left, GND is in the middle, and the 5V output should be on the right. The actual values of the caps matter, too. The number after the hyphen is the regulated output voltage and the input voltage must be somewhat higher. Is ths just because of the load placed on it due to the lcd? Thanks for the insight, guys. Did you take steps to obtain caps with appropriate ESR?

Many of the regulators require capacitance on the input and output to minimize oscillation. Can you let us know what is printed on the third line? Hi John, What is the input voltage to the regulator — can you measure it? Larger values of output capacitance will give improved transient response.

The ESR of the output capacitor will cause loop instability if it is too high or too low. Sign In or Register to comment. Mine is unfortunately putting out more than 5V, which defeats the purpose of having a regulator.

My pmct Voltage regulator not working as expected. You probably still need the capacitor. Datashet, remember the more voltage you have to drop and the dataseet current you want to pull, the hotter the device will run. LMct 5. The power in Watts being dissipated within the regulator is the voltage drop across the regulator times the current passing through it. Another, does your LCD has backlights?

Should I use some other dataaheet regulator? I picked up some 5V 1A voltage regulators at a shop in xatasheet. Does it have a backlight? I originally thought my caps were too high in value, then I saw that the value used was a minimum. Check your caps, it might be leaky. Related Posts

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