The TPS74901RGWR is a single-output, positive adjustable LDO regulator from Texas Instruments, delivering up to 3 A continuous output current from a 5.5 V maximum input rail. Output voltage is adjustable from a 0.8 V reference up to 3.6 V, making it suitable for powering low-voltage core rails in FPGAs, ASICs, and mixed-signal processors.
Dropout and PSRR — what they mean for the rail
Power-supply rejection ratio is specified at 60 dB at 1 kHz, rolling off to 30 dB at 300 kHz — upstream switching noise above the crossover frequency will couple through unless the LDO input is pre-filtered with a low-ESR ceramic cap.
Protection and control features
Integrated protection includes over-current, over-temperature, short-circuit, and under-voltage lockout (UVLO) — the regulator enters a safe state without external supervisory components. Control features — Enable, Power Good, and Soft Start — allow sequenced power-up and fault reporting to a system controller or FPGA.