Active production — key parametrics for the BOM line
The LP5907SNX-3.1/NOPB: It delivers a fixed 3.1 V output at up to 250 mA, with a maximum dropout of 0.25 V at full load — the headroom between input rail and output must stay above 250 mV across load and temperature to maintain regulation. Quiescent current is 25 µA typical, and the maximum supply current is 425 µA — the low Iq suits battery-powered or always-on nodes where the regulator's own draw must not dominate the sleep budget.
PSRR across the audio band and beyond
Power-supply rejection ratio is 90 dB at 100 Hz, rolling to 60 dB at 100 kHz — this means the LDO attenuates low-frequency ripple (e.g., 50/60 Hz mains hum and its harmonics) by a factor of ~31,600, while higher-frequency switching noise from a buck converter upstream sees only ~1,000× rejection. For a 3.1 V rail feeding an audio codec or precision ADC, the 90 dB PSRR at 100 Hz keeps supply-borne artifacts below the noise floor of a 16-bit system; the roll-off above 10 kHz means the input filter ahead of the LDO should handle switching frequencies above 100 kHz.
Package and temperature grade for board integration
Protection features include over-temperature shutdown and short-circuit current limiting — the LDO folds back output current during a fault and recovers once the junction cools, preventing thermal runaway in a sustained overload.
RoHS3 compliant per the manufacturer's declaration — no restricted substances above the threshold; the part carries the /NOPB suffix indicating lead-free (Pb-free) construction.