3V fixed, 1A LDO in SOT-23-5
The Texas Instruments TLV75730PDBVR is a single-output, positive fixed LDO regulator delivering 1A at 3V from a maximum 5.5V input rail. The SOT-23-5 package (SC-74A, SOT-753) keeps the footprint small for space-constrained power rails on sensor nodes, wireless modules, or MCU core supplies.
Dropout and PSRR at the load
PSRR holds at 52dB from 1kHz through 1MHz, meaning upstream switching noise in that band is attenuated by a factor of ~400 before reaching the load. For a 3.3V rail feeding a 3V LDO, the 300mV headroom is tight but workable if the upstream regulator's dropout and line regulation are accounted for. Quiescent current is 40µA max — the regulator's own draw is low enough for battery-powered designs that spend most of their time in sleep, though the 1A output capability is sized for active bursts rather than continuous high current.
Protection and control
Built-in current limit, thermal shutdown, and undervoltage lockout (UVLO) protect the load and the regulator against fault conditions. The Enable pin allows the output to be gated by a logic signal — useful for sequencing rails or shutting down the regulator in low-power standby modes.