Self shutdown

124

01:40:16

Self  shutdown with zero current , to keep battery life.  All in one pushbutton. The 20 ohm is the curcuit load. After the PB pressed , the microcontroller in startup gives "1" and keep the PMOS in ON even the PB released .
Afrer a while,  when the mc wonts to shutdown he can do it. Meanwhile the PB can still act as an input to the mc itself. 

published 7 years ago

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