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LTM4626/LTM4638 INTVcc

Category: Hardware
Product Number: LTM4626

It appears that the efficiency of LTM4626/LTM4638 is heavily affected by input voltage, supposedly due to the losses on internal LDO, generating INTVcc.

Is there a way of bootstrapping the INTVcc pin - from the output of the device itself, or from an external +3.3V power rail?

How the efficiency is affected?

Thanks in advance,