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I would like to power a Nucleo-64 with an STM32L073RZ on it from lithium-ion battery. If I switch JP5 U5V to E5V and connect +3V7 to Vin the system seems to power up but the +3V3 rail is sitting at +3V0 which I feel is too low to run the uC. Suggestions

Graham1904
Associate II
 
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