Regulator identity and key parametrics
The TLV70225DSER is a single-output, positive-voltage LDO regulator from Texas Instruments, delivering a fixed 2.5 V output at up to 300 mA. It comes in a 6-WSON (1.5x1.5 mm) surface-mount package, suited for space-constrained boards where a clean, regulated rail is needed from a 5.5 V max input. The 68 dB PSRR at 1 kHz means this regulator attenuates ripple from a switching pre-regulator or noisy bus by a factor of roughly 2500 — useful for analog front-ends or RF stages where supply noise couples into the signal path. Dropout voltage is 0.38 V max at the full 300 mA load, so the input rail needs to stay above 2.88 V to maintain regulation. Below that, the output follows the input minus the dropout — a common failure mode on boards where the upstream rail sags under load.
Protection and operating range
Built-in protection covers over-current, over-temperature, reverse polarity, and under-voltage lockout (UVLO). The UVLO prevents the output from turning on until the input is high enough to stay in regulation — avoids brownout glitches on the downstream load. Operating temperature spans -40°C to 125°C junction, making it suitable for industrial or automotive environments where the board sees wide thermal swings. The enable pin lets a GPIO or supervisor shut the regulator down, dropping quiescent current to near zero. Quiescent current is 55 µA typical, with a maximum supply current of 370 µA — low enough for battery-powered designs that spend most of their time in sleep mode, but not the lowest in class if every microamp counts.
No pin-compatible second source is listed on the record; the 6-WSON footprint is specific to this TI series.