Dropout and quiescent current at temperature
The TPS767D325PWP: Quiescent current is 125 µA typical, a figure that matters for always-on rails where the regulator's own draw competes with the sleep-mode budget of the downstream load. Power-supply rejection ratio is 60 dB at 1 kHz, which attenuates 1 mV of input ripple to 1 µV at the output at that frequency. Above the crossover frequency the rejection rolls off, so upstream switching noise above a few hundred kilohertz should be filtered ahead of the LDO or managed with a post-filter capacitor.
Protection and control interface
On-chip protection includes over-current limiting, thermal shutdown, and reverse-polarity protection — the regulator survives a reversed input without damage, though the output does not regulate during the fault. The Enable pin allows the outputs to be sequenced; the Reset output provides a power-good signal to the downstream processor or FPGA when both rails are within regulation.