It is not recommended to directly connect the VCC supply to the UP pin (ADM1186-1) or the UP/DOWN pin (ADM1186-2) to initiate sequencing when power is applied.
When the UVLO (Undervoltage Lockout) circuit activates the state machine, it enters the fault handler states by default. To transition into the WAIT START state—where sequencing can begin—the UP (ADM1186-1) or UP/DOWN (ADM1186-2) pin must be held low after the state machine is enabled.