Don't use a buck converter to drop 6V to 5V, it won't be any more efficient than a linear regulator. Either use a 5V buck converter running from your 12V supply, or use a linear LDO regulator to drop the 6V to 5V.
Don't use a buck converter to drop 6V to 5V, it won't be any more efficient than a linear regulator. Either use a 5V buck converter running from your 12V supply, or use a linear LDO regulator to drop the 6V to 5V.