Not sure about Minimum Current, but as per STM datasheet the maximum current rang is up to 25mA. you can see it in the datasheet page 58, Arm® Cortex®-M4 32b MCU+FPU, 105 DMIPS, 256KB Flash/64KB RAM, 11 TIMs, 1 ADC, 11 comm. interfaces (st.com). I ...