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The ADP1765 is a low noise, low dropout (LDO) linear regulator. It is designed to operate from a single input supply with an input voltage as low as 1...
ADP1765 on Analog.com
I need to verify the high input voltage limit for the EN pin based upon a VIN of 1.1V. Can the EN pin handle an 1.8V or 3.3V input, or is the maximum limited to VIN (1.1V).
Yes, EN of 1.8V or 3.3V will be possible with the ADP1765 family. The device's EN pin is rated up to ABS MAX of 3.96V