Tool/software:
Hello,
Please can you confirm minimum feedback current requirement for LM5158. My intention is to know the maximum permissible resistor values for the feedback network.
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Tool/software:
Hello,
Please can you confirm minimum feedback current requirement for LM5158. My intention is to know the maximum permissible resistor values for the feedback network.
Hi KrnB,
Thanks for reaching out.
Please have a look at the following document: https://www.ti.com/lit/an/slyt469/slyt469.pdf
If the feedback resistance is too high, the output voltage can become inaccurate depending on the current flowing in the FB pin.
This current is in the range of tens of nA. For your calculations you can assume a max. IFB of 50-80nA.
Best regards
Moritz