50mA LDO with 60dB PSRR at 100kHz — SC-70-5 footprint
The Texas Instruments TPS71519DCKR is a fixed 1.9V output, 50mA LDO in a 5-pin SC-70-5 (SOT-353) package. Its 60dB PSRR at 100kHz means it attenuates switching noise from a downstream DC-DC converter by a factor of 1000 at that frequency — a meaningful spec for powering a precision voltage reference or an ADC analog supply where the upstream rail carries ripple. Quiescent current is 4.2 µA typical. For a battery-powered sensor that sleeps 99% of the time, the regulator's own draw sets the floor on system idle current — the TPS71519DCKR adds less than 5 µA to the sleep budget.
Dropout headroom and temperature grade
Maximum dropout voltage is 0.75V at the full 50mA load. The part holds its output accuracy and PSRR across this range, though the dropout voltage increases at temperature per the datasheet's typical curve.
The part is suitable for new designs and carries no last-time-buy pressure.