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Hello. Can we externally provide 3.3V, 2.5V, 1.8V power DC voltages in order not to use the on-board DC/DC boost/buck converters? Our application is noise sensitive, we want to avoid these noisy devices.
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Simple answer: No.
The module can not be powered externally. Not all powers are available on the connector (some are, but they may not have enough pins to carry enough current). Also, transferring the precise voltage over the connector could cause voltage drop and for example memories could stop working reliably - I am not saying that would happen, but it could happen.
Maybe you could find a way how to cover the module with a metal shield .. maybe that could be also a way?
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