Is the PB137 *really* reverse protected?

Discussion in 'The Projects Forum' started by jsmith24, May 18, 2015.

  1. jsmith24

    Thread Starter New Member

    Jul 10, 2013
    Hi all,

    In building my little makeshift solar charge controller (panel is 1.5 Watts, maxes out around 250-290 mA), someone suggested I use a PB137 voltage regulator to regulate the voltage coming in for charging the SLA battery.

    My questions are these: Does the PB137 stop supplying output voltage if the input falls below its dropout limit? The datasheet specifies about 10 uA of reverse leakage current: has anyone used these that can verify that? Lastly, the supplied circuit in the datasheet has a cap on the input and output: are these just to filter the ripple, or are they absolutely necessary?


  2. blocco a spirale

    AAC Fanatic!

    Jun 18, 2008
    This may be useful: