1A LDO with 60 dB PSRR — where the noise rejection matters
The TPS76825QPWP: This is a 1A low-dropout linear regulator with a fixed 2.5V output, positive rail, single-regulator configuration. The 60 dB power-supply rejection ratio at 1 kHz means it attenuates upstream switching ripple by a factor of 1000 at that frequency — relevant when the input rail comes from a buck converter or a noisy digital supply. The 125 µA quiescent current keeps the regulator's own draw low enough for always-on rails in battery-backed equipment. Operating temperature spans -40°C to 125°C, covering industrial enclosures and under-hood automotive ambient without derating the output current. The protection set — overcurrent, overtemperature, reverse polarity — means the regulator survives a miswired input or a sustained load fault without cascading into the downstream circuitry.
20-HTSSOP package — thermal pad and rework reality
The pad also makes hand rework trickier — a hot-air station with a nozzle that matches the pad footprint lifts the part cleanly; a wide nozzle heats the adjacent passives and can shift them.
Control features: Enable and Power Good
The Enable pin lets a system sequencer or a supervisor IC turn the regulator output on and off — useful for power-rail sequencing or shutting down a sub-circuit in sleep mode. The Power Good open-drain output asserts when the output is within regulation; it can drive a reset input or a status LED without an external comparator. Both features are standard on this family and reduce the external component count for a sequenced power tree.