I need a DC/DC regulator. The input is 12V to 17V, output is 12V at 1.5V. I checked LM25011. It regulates output to 12V when input is above 14V. My questions is what the output will be when input is between 12V and 14V. Will this chip pass through the input to output? If so, I can use this chip. If not, can you give me some recommendation? Thanks.