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STEVAL-STWINKT1B - Battery Operation with 3.7V


Hi everyone,

I'm working with the STEVAL-STWINKT1B and have a question about powering it with a 3.7V battery. The board uses the STBC02 PMIC, which operates between 4.5V and 5.4V according to its datasheet.

The datasheet suggests the STBC02 charges a battery using a 5V input from USB or an external source. However, it also mentions a "Sys net" input for the internal LDO of the STBC02. This LDO output feeds another DCDC buck converter powering the MCU and peripherals, along with an analog LDO for the MCU VREF.

My question: Can the STEVAL-STWINKT1B function directly from a 3.7V battery when there is not USB or external input, even though the PMIC datasheet specifies a higher voltage range?