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  1. Olin Lathrop

    3V,7.7mA supply from 12V battery

    The voltage divider on the output is not a good idea. It raises the output impedance and causes a lot of quiescient current draw. Surely there are 3V regulators out there that can handle 12V in, but if you can't find one for some reason you can use a adjustable regulator. That seems to be...
  2. Olin Lathrop

    3V,7.7mA supply from 12V battery

    Hi, Bob. I see you're in Worcester, but I otherwise can't tell who you are. You make it sound like we've met before. Care to elaborate on who you really are?
  3. Olin Lathrop

    3V,7.7mA supply from 12V battery

    Normally when stepping down so much (1/4 of the input voltage in this case), you'd use a buck converter for efficiency. However, since your load only draws 7.7 mA, the dissipation in a simple linear regulator is only 70 mW. Even something as small as a SOT23 package can handle that without...
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