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Design an LDO with external reference input signal using NE57814

Question asked by YI HUANG on Sep 6, 2016
Latest reply on Sep 19, 2016 by Jose Alberto Reyes Morales

Hi, I am designing a general purpose LDO with external input reference. I have the samples of NE57814. Can someone help me regarding the following questions?

(1) From the datahsheet it says max VD and VDD=3.6V. If I am using VD=VDD=5.5V, will it break the circuit or make it unfunctional? I am not doing mass production. So as far as it still functions, that is good for me.

(2) Can I connect external resistor dividers to close the feedback loop (I do not want VTT=VREF, but VTT=K*VREF, where K is a number greater than 1)? If so, how can I connect it? The question is illustrated in the attachment.

(3) If I cannot use NE57814, are there any other products I can choose, which can be used as the LDO with external input reference signal?

 

Thank you!

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