What is the required current of VCC 3.3V if it is supplied externally?
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If supplied externally, the required current must be above the quiescent supply current. I see that its not explicitly stated on the datasheet. I will confirm and get back to you on this.
I am following up on the previous answer.
External power to VCC is only needed when VIN is 4V or less.
We recommend utilizing the device’s internal LDO to power VCC. Additionally, since VCC is only powered by Vin when quiescent or at steady state, please refer to the device power requirements captured below :