Fixed 1.5V LDO in SOT-23-5
The TLV71315PDBVT from Texas Instruments is a single-output, positive fixed LDO regulator delivering 150 mA at 1.5 V from a maximum input of 5.5 V. The SOT-23-5 package (SC-74A) suits space-constrained boards where a clean, low-noise rail is needed for analog or digital loads.
PSRR and quiescent current trade-off
PSRR runs 70 dB at 100 Hz and rolls to 55 dB at 1 MHz — this covers the switching noise band of most DC-DC converters feeding the LDO input. The 75 µA quiescent current means the regulator's own draw stays low enough for battery-operated gear; the enable pin lets you shut the output entirely when the load is idle.
Dropout and protection at 150 mA
Maximum dropout is 1.02 V at the full 150 mA load — the input rail needs to stay above 2.52 V to keep the 1.5 V output in regulation. Protection includes over-current, over-temperature, reverse polarity, short circuit, and under-voltage lockout (UVLO), so the part handles fault conditions without external clamp diodes in most designs.