The LT3065IMSE-2.5#PBF delivers 72 dB of power-supply rejection at 120 Hz — the ripple frequency from a full-wave rectified mains supply. For an analog front-end powered from a switching regulator, this PSRR figure attenuates the 120 Hz ripple by a factor of 4000, keeping the LDO's 2.5 V output clean enough for a 16-bit ADC reference or a precision op-amp rail without additional post-filtering. At 500 mA output with a fixed 2.5 V rail, this LDO is sized for powering the analog supply domain on a mixed-signal board — the 0.51 V max dropout at full load means the input rail needs to stay above 3.01 V to hold regulation at 500 mA.
Wide input range and protection set
Input voltage tolerance up to 45 V lets this part operate directly from a 24 V industrial bus or a 12 V automotive rail with margin for load-dump transients — no external pre-regulator needed. The quiescent current is 110 µA, which matters for always-on rails in battery-backed systems where the LDO's own draw competes with the load's sleep current. On-chip protection includes over-current limiting, thermal shutdown, and reverse-polarity protection — the reverse-polarity clamp means the part survives a miswired input without an external Schottky diode, saving board space and BOM cost on the input protection circuit. Control features — enable pin for sequencing, power-good flag for reset generation, and soft-start to limit inrush current into the output capacitor — are all integrated, so no external timing components are needed for a basic power-up sequence.
Active lifecycle — no end-of-life pressure
This part is suitable for new designs without a planned migration path.