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APM 2.5 voltage across TPS79133

Posted by Ankit Sarvaiya on October 23, 2013 at 12:52pm

Hi,

My APM 2.5 recently gave up on connecting with Mission Planner using 3DR radios. I did my research and came across finding voltage across this chip that turned out to be "not right".

According to online sources, what is shown in the picture below is supposed to have output of 3.3 volts, I am getting a reading of 0.98 volts. 

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I'd like to ask experienced members of this community if I shall go on at replacing the chip, which I think is called "TPS79133"

Thanks, 

 

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Replies

  • Detlef November 1, 2013 at 4:02pm

    Hi Ankit, if you get a reading a little below 1V then the regulator is shot. With the regulator removed I end up around 0.85V on my board - if its working you should have pretty exact 3.3V +/-5%.

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