You are interpreting the diagram in the data sheet wrong.

Your buck-boost IC does not need chassis ground, so you should stop thinking about chassis ground as it has nothing to do with the IC.

Please read datasheet page 3 for short description of ground pins, and pages 7 and 17 for longer explanation.

Use the find function in your PDF reader for the word "ground" and read the text.

You are interpreting the diagram in the data sheet wrong.

Your buck-boost IC or your PCB do not need a chassis ground, so you should stop thinking about chassis ground as it has nothing to do with the IC.

Please read datasheet page 3 for short description of ground pins, and pages 7 and 17 for longer explanation.

Use the find function in your PDF reader for the word "ground" and read the text.

You are interpreting the diagram in the data sheet wrong.

Your buck-boost IC does not need chassis ground.

You are interpreting the diagram in the data sheet wrong.

Your buck-boost IC does not need chassis ground, so you should stop thinking about chassis ground as it has nothing to do with the IC.

Please read datasheet page 3 for short description of ground pins, and pages 7 and 17 for longer explanation.

Use the find function in your PDF reader for the word "ground" and read the text.