ZHCSEI2B January 2016 – June 2021 TPS7A84
PRODUCTION DATA
Soft-start refers to the ramp-up time of the output voltage during LDO turn-on after EN and UVLO exceed the respective threshold voltages. The noise-reduction capacitor (CNR/SS) serves a dual purpose of both governing output noise reduction and programming the soft-start ramp time during turn-on. The start-up ramp is monotonic.
The majority of the ramp is linear; however, there is an offset voltage in the error amplifier that can cause a small initial jump in output voltage; see the Section 8 section on implementing a soft-start.