40 V input, 6.1 µA quiescent — what that buys the rail
The Renesas RAA2144014GP3#JA0 is a single-output positive LDO regulator delivering a fixed 3.3 V at up to 150 mA from a 40 V maximum input. The headline draw here is the 6.1 µA quiescent current — that keeps the regulator alive on an always-on battery or standby rail without draining the pack. The wide input range means it can regulate down a 12 V or 24 V industrial bus, or survive load-dump transients on an automotive rail, without a separate pre-regulator. Dropout is specified at 1.6 V maximum at the full 150 mA load, so a 3.3 V output needs at least 4.9 V on the input to stay in regulation under worst-case current. That's comfortable off a 5 V rail, but tight if you're trying to run from a 3.6 V lithium cell — the dropout eats most of the headroom.
PSRR across the audio band — useful for analog supplies
Power-supply rejection ratio runs 77 dB at 10 Hz, rolling off to 42 dB at 10 kHz. That's enough to clean up 50/60 Hz ripple from a mains-derived rail and still provide decent rejection of switching-regulator noise in the low kilohertz range. If the load is an analog front-end or a precision reference, this LDO can serve as a post-regulator for a noisy DC-DC converter.
Package and temperature grade — fits industrial and automotive environments
Housed in a three-lead SOT-23-3 (also listed as TO-236-3 / SC-59), the part is a drop-in for standard LDO footprints. The operating junction temperature range of -40°C to 125°C covers under-hood automotive and outdoor industrial enclosures without derating. Surface-mount assembly only; the SOT-23-3 dissipates through the leads and the small tab, so thermal performance depends on board copper area.
Protection features — over-current, over-temperature, short-circuit
Built-in over-current, over-temperature, and short-circuit protection mean the regulator folds back or shuts down before the die or the load sees damage. For a fixed-output LDO in a small package, these protections are essential — the SOT-23-3 has limited thermal mass, and a sustained short could otherwise exceed the junction rating.
Lifecycle and sourcing — active, no LTB risk
RAA2144014GP3#JA0 carries an Active lifecycle status with ROHS3 compliance.