Dual-rail LDO for noise-sensitive supplies
The MAX8559ETA88+ is a dual 300 mA low-noise linear regulator from Analog Devices, delivering two independent fixed 1.5 V outputs from a single input rail up to 6.5 V. It is designed for powering analog and RF sections where supply ripple couples into the signal path — the PSRR holds 70 dB at 10 kHz and 54 dB at 100 kHz, so switching converter noise above 10 kHz sees meaningful attenuation before reaching the load.
Quiescent current and protection set
Quiescent current is 290 µA typical per regulator — modest for a dual LDO but not ultra-low-power; the part suits always-on rails where the load current dominates the system budget. Each output is protected against over-current, over-temperature, and short-circuit events, which matters when the regulator feeds a downstream DC-DC or a sensor that can short on the board. The Enable control pin lets each regulator be sequenced independently — useful when core and I/O rails must ramp in a defined order.