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LM5176EVM-HP: LM5176 proplem

Part Number: LM5176EVM-HP
Other Parts Discussed in Thread: LM5176

hi  Team:

I use the LM5176EVM-HP  Schematic diagram,and designed a buck-boost  Power:



1. when R7 use 10mR,it can normal work;

2. when R7 use 9mR,it can normal work;

3. when R7 use 8mR, VIN  from 8-13V,it can only Load with 2A;

4. when R7 use 7mR,it can normal work;

5. when R7 use 4mR,it can normal work;

my question is :why R7 use 8mR,VIN  from 8-13V,it can only Load with 2A;?

  • Hi Jessica,

    Thanks for reaching out with your questions and for using the LM5176.

    Can you please describe what is meant by it is not operating normally? Is the output falling out of regulation? Is the loop unstable? Was there anything else changed from the schematic of the evaluation board?