300 mA LDO with 3.2 V fixed output — PSRR that matters for RF rails
The TPS7A2032PDBVR is a 300 mA low-dropout regulator from Texas Instruments with a fixed 3.2 V output. It draws just 15 µA quiescent current and delivers a PSRR of 65 dB at 100 Hz, rolling off to 40 dB at 1 MHz — the high-frequency rejection is what makes this part a fit for powering sensitive RF or analog front-end rails where switching noise from a buck converter would otherwise couple into the signal path.
Dropout, protection, and temperature grade
Maximum dropout is 145 mV at the full 300 mA load, so the input rail needs only 3.345 V to maintain regulation — this matters in battery-powered designs where the cell voltage sags under load. The junction temperature range spans -40°C to 125°C, covering industrial and under-hood automotive environments. On-chip protection includes over-current, over-temperature, and under-voltage lockout (UVLO), which prevents the output from turning on until the input is stable.
Package and control features for compact designs
Housed in a 5-pin SOT-23-5 (SC-74A) package, the footprint is small enough for space-constrained portable or sensor-node PCBs. The Enable pin allows external on/off control, and the Soft Start feature limits inrush current during power-up — useful when the regulator feeds a capacitive load or a module that must sequence after the main rail is stable.
Lifecycle and sourcing reality
This part carries an active lifecycle status — no end-of-life notice, no successor to plan for. It is suitable for both new designs and production replenishment.