SLUSB56B November 2012 – April 2019 TPS53819A
PRODUCTION DATA.
When the EN pin voltage rises above the enable threshold voltage and/or ON_OFF bit is set via PMBus according to the setting in OPERATION command, the controller enters a start-up sequence. After a programmed power-on-delay duration from 0.35 ms to 32.86 ms, the internal DAC starts ramping up the reference voltage from 0 V to a target voltage (typically 0.6 V) with the programmed soft-start time from 1 ms to 8 ms. The device maintains a smooth and constant output voltage ramp-up during start-up regardless of load current.