Fixed 1.5V rail, 350 mA — what that means on the bench
The TPS72015YZUR is a single-output positive LDO from TI, delivering a fixed 1.5 V at up to 350 mA continuous. The maximum dropout is 200 mV at full load, so the input rail needs to stay above 1.7 V across the load range to keep the output in regulation — a 1.8 V bus with 100 mV margin works; a 1.5 V rail will not.
PSRR across the band — where the noise rejection lives
PSRR is specified at 85 dB at 10 Hz, rolling off to 50 dB at 1 MHz. That 35 dB drop above 100 kHz means upstream switching noise from a buck converter or charge pump passes through more readily — if your 1.5 V rail feeds an analog front-end, you want the switching frequency above 1 MHz where the PSRR floor is still 50 dB, or add a post-filter L-C stage. The quiescent current is 38 µA typical, max supply current 80 µA — low enough for always-on battery-powered nodes where the regulator's own draw matters more than the load's idle current.
DSBGA package — board-fit and rework reality
The DSBGA package's CTE mismatch with FR4 is manageable at this range, but a board with multiple power planes should have the bump pad array on a solid copper island to spread the heat evenly.
Protection and control — what trips and what doesn't
Built-in over-current, over-temperature, and under-voltage lockout (UVLO) protection. The UVLO threshold sits below the dropout ceiling — if the input sags below about 1.2 V, the output shuts off cleanly rather than dropping into an undefined state. Over-temperature trip is around 160°C junction; after cooling, the part auto-recovers with a hysteresis band of about 20°C. The enable pin lets you gate the output — pulled low, the regulator drops into shutdown with near-zero quiescent draw. No pull-up resistor is needed; the pin has an internal current source to a logic-high state when left open.
Lifecycle and compliance — active, no end-of-life watch
The part is available through authorized distribution channels; for current pricing and lead time, submit an RFQ against your BOM quantity.