3V fixed rail, 150mA capacity, 100µA quiescent
The TPS76330DBVT is a fixed 3V output LDO from Texas Instruments, rated for 150mA continuous output current. The 100µA typical quiescent current keeps the regulator's own draw low in always-on rails — a sensor node or MCU supply that idles most of the time wastes less power than a higher-Iq part. The 60dB PSRR at 1kHz means ripple from a switching converter upstream is attenuated by a factor of 1000 at that frequency — useful when the LDO sits after a buck converter to clean up the output for analog or RF sections.
Protection set and temperature grade
Over-current, over-temperature, and reverse polarity protection are built in — the part survives a shorted output or a hot environment without external clamp diodes. The -40°C to 125°C operating range covers industrial and automotive ambient, though this specific variant is not AEC-Q100 listed in the record. The SOT-23-5 package (SC-74A / SOT-753) is a standard five-pin footprint. The Enable pin lets a GPIO or supervisor IC shut down the output, dropping the supply current to near zero in sleep mode.