TPS7A8901RTJR

TPS7A8901RTJR is a dual-channel low-noise LDO regulator from Texas Instruments in a 20-pin WQFN (RTJ) package, delivering 2 A per channel from a 1.4 V to 6.5 V input with adjustable 0.8 V to 5.2 V outputs. Its advantage is power-supply cleanliness: 3.8 µVRMS noise (10 Hz to 100 kHz), 75 dB PSRR at DC and 40 dB at 1 MHz, and 1% output accuracy keep ADC, DAC, clock and RF rails free of supply-induced spurs, which removes a whole class of hard-to-debug signal-integrity failures. The 180 mV typical dropout at 2 A also preserves headroom in tight 3.3 V and 5 V systems. Selection advice: the RTJR code is the WQFN-20 tape-and-reel variant rated -40 to 125 °C; budget both channel currents together, since the two outputs share one die and one thermal path. Parameters verified against the TI TPS7A89 product page and packaging appendix (ACTIVE / Production).