1.5A LDO with 0.30V dropout at full load
The Texas Instruments TPS75315QPWP is a single-output, positive-voltage LDO regulator delivering a fixed 1.5V output at up to 1.5A from a 5.5V max input rail. Maximum dropout voltage is 0.30V at the full 1.5A load, meaning the input must stay at least 300 mV above 1.5V across the operating range to maintain regulation — a 1.8V rail is the practical minimum input.
PSRR and quiescent draw for noise-sensitive rails
Power-supply rejection ratio is 63 dB at 100 Hz, which attenuates 100 Hz ripple from a mains-derived input by a factor of roughly 1400 — relevant for analog front-ends or precision bias supplies where line-frequency noise couples into the output. Quiescent current is 125 µA typical; the regulator's own draw stays under 0.01% of the full output current, so it does not materially affect efficiency in always-on 1.5A loads.
Control, protection, and temperature grade
Control features include Enable, Power Good, and Reset Output — the Power Good flag asserts when the output is within regulation, useful for sequencing downstream rails or holding a microcontroller in reset until the 1.5V bus is stable. On-chip protection covers Over Current, Over Temperature, and Reverse Polarity — the reverse-polarity clamp protects the regulator if the input is accidentally reversed, a safeguard for battery-powered or field-wired supplies.
Package and board-fit: 20-HTSSOP with exposed pad
Surface-mount assembly; the tube packaging (50 units per tube) is standard for prototype and low-to-mid volume production runs.
Active lifecycle and compliance documentation
ROHS3 compliant; the manufacturer provides full RoHS, REACH, and material declaration documentation through its standard compliance portal.