What this LDO brings to a low-power rail
The Texas Instruments TPS7A0325DQNR is a single-output, positive-voltage LDO regulator delivering a fixed 2.5 V output at up to 200 mA. Its quiescent current is 300 nA.
PSRR and noise rejection in context
With 55 dB of power-supply rejection ratio at 1 kHz, this LDO attenuates ripple from a switching pre-regulator or a noisy digital rail. The protection suite covers over-current, over-temperature, and under-voltage lockout.
Package and mounting
The part comes in a 4-X2SON package measuring 1 mm × 1 mm (supplier device package 4-X2SON). The exposed pad underneath must be soldered to the PCB ground plane for thermal relief.
Lifecycle and sourcing posture
The TPS7A0325DQNR is listed as Active with ROHS3 compliance. There is no end-of-life notice, no last-time-buy window, and no announced successor — this part is current-production and suitable for new designs. If your line needs cut-tape or a smaller quantity for prototyping, the 'DGN' suffix variants cover those options.