LM2940 DATASHEET PDF
The LM/LMC positive voltage regulator features the ability to source 1A of output current with a dropout volt- age of typically V and a maximum of. The LM LMC positive voltage regulator features the ability to source 1A of output current with a dropout voltage of typically 0 5V and a maximum of 1V. The LM positive-voltage regulator features the Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
|Published (Last):||18 February 2010|
|PDF File Size:||19.95 Mb|
|ePub File Size:||18.22 Mb|
|Price:||Free* [*Free Regsitration Required]|
I live in Lincoln. Whether the or Hz ESR is relevant is tbd BUT as you have a 2 x mains input ripple that the regulator is dealing with this may dataaheet the instability trigger. If not then what am I looking for exactly. I was using the above to supply 5v to my Atmegap-pu project in my automotive environment for controlling the signal that turns on some lights via Mosfet.
Is the scope trace datqsheet when under load? However, I have found that higher-frequency fluctuations in voltage are not properly regulated by the LM, causing intermittent brown-out of the MCU. Do you also have the input capacitor 0.
I just thought the OKIsr might be a little overkill datasheet terms of cost for other similar stuff down the road. Now my confusion starts with ESR and capacitor type Locate as close as possible to the regulator.
The suggested solution in that appnote, figure 7 vs. I have used the LM in a number of designs with no problem using tantalum input and output caps. I read the dataeheet sheet for the LM and understand I need two capacitors one on the input and one on the output.
Perhaps I have misunderstood this specification? The vishay datasheet shows change of ESR with frequency. You have 5V on the schematic which can’t work.
With such low power involved you can go with the linear regulator, you shouldn’t have any problem. Home Questions Tags Users Unanswered. If the schematics is right, your input voltage is too low, the LDR needs some headroom to regulate how much depends on ln2940 actual load.
Does anyone have any ideas how I might stabilize this output? Is your automotive environment 12V or 24V? CuF is an SMD tant: I’m encountering some instabilities in datasheey regulated voltage supply. The average voltage at the input is around 6. Have you taken their compulsory advice re the output capacitor?
Sign up or log in Sign up using Google. This chip predates big cheap ceramic caps, I think.