Hello,
The LP3985 datasheet refers to two functional modes in section 7.4:
7.4.1 Operation with VOUT(TARGET) + 0.3 V ≤ VIN ≤ 6 V The device operates if the input voltage is equal to, or exceeds, VOUT(TARGET) + 0.3 V. At input voltages below the minimum VIN requirement, the devices does not operate correctly, and output voltage may not reach target value.
7.4.2 Operation Using the EN Pin If the voltage on the EN pin is less than 0.4 V, the device is disabled, and in this state shutdown current does not exceed 1.5 μA. Raising VEN above 1.4 V initiates the start-up sequence of the device.
If I understand correctly this is an either or situation, where you either use the enable pin and then the standard Vdo applies or this other mode where the Vdo is 300mV? Can you please elaborate on what 7.4.1 is functionally implying from an application perspective?
Thanks,
-Michael