Dual 150 mA LDO with fixed 1.8V and 2.8V rails
The MIC5381-MGYFT-TR is a dual-output low-dropout linear regulator from Microchip Technology, delivering two independent fixed outputs: 1.8V and 2.8V, each rated for 150 mA continuous current. With a maximum input voltage of 5.5V and a dropout voltage of just 0.31V at full load, this part is well-suited for powering dual-rail analog or mixed-signal circuits from a single 3.3V or 5V bus.
PSRR and noise rejection for sensitive loads
The regulator provides 60 dB of power-supply rejection ratio at 1 kHz, meaning ripple on the input rail at that frequency is attenuated by a factor of 1000 before reaching the output. This level of PSRR makes the MIC5381-MGYFT-TR a strong choice for powering analog front-ends, ADCs, or RF stages where supply noise directly degrades signal integrity.
Temperature range and quiescent current
Quiescent current is 45 µA typical, rising to a maximum supply current of 85 µA — low enough to keep battery-powered designs alive during sleep modes.
Housed in a 6-lead UFQFN or 6-TMLF® package measuring 1x1 mm, the MIC5381-MGYFT-TR is a surface-mount device that fits into space-constrained portable or wearable designs. The Enable control pin allows the regulator to be shut down externally, reducing the load to near-zero quiescent current when the downstream circuitry is idle.