LM2576 output voltage error

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LM2576 output voltage error

Postby mozobata » Mon Jul 17, 2017 11:32 am

In my earlier post, I was using LM317 for SIM900 but due to some voltage drop problem, I decided to go with LM2576. I am trying to step down the voltage from 12v to 4.5v using LM2576 (here is the datesheet of lm2576). I have studied the voltage calculation formula described on page 21. For the time being, I am just testing it on breadboard so have not connected the capacitors and diode at the output. Following is the schematic
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