250 mA LDO with a PSRR floor that matters for noise-sensitive rails
The TPS72730YFFT is a single-output positive LDO from Texas Instruments, fixed at 3 V, delivering up to 250 mA. Its headline spec is the PSRR: 85 dB at 10 Hz rolling off to 45 dB at 1 MHz — that keeps switching noise from a downstream buck or a digital core off an analog supply rail. Dropout is 200 mV max at 200 mA, so a 3.3 V input rail needs only 200 mV headroom to hold regulation at full load. Quiescent current sits at 110 µA typical, 130 µA max — low enough for battery-powered gear that spends most of its time in a light-load state.
Package, temperature grade, and protection — what fits the board
Housed in a 4-bump DSBGA (4-UFBGA) measuring 1x1 mm, the TPS72730YFFT is a true chip-scale package. The supplier device package is 4-DSBGA (1x1) — the solder balls sit directly on the PCB pads with no plastic overmold, so the board footprint is the package outline. That saves board area but demands a controlled reflow profile and a clean stencil aperture for the 0.5 mm pitch. Operating temperature spans -40°C to 125°C, covering industrial enclosures and under-hood ambient without derating. Protection features include over-current, over-temperature, and under-voltage lockout (UVLO) — the regulator shuts itself down before the output rail collapses into an indeterminate state.
Active lifecycle and compliance — no obsolescence watch needed
RoHS3 compliant per the current declaration — no exemption-driven end-of-life trigger on the horizon.