MIC3490 Low-Dropout Regulators Microchip Technology MIC3490 Low-Dropout Regulators are highly accurate with a high input voltage and ultralow ground current. This combination makes the MIC3490 ideal for multi-cell Li-Ion battery systems. As a µCap LDO design, the MIC3490 is stable with ceramic or tantalum output capacitors. The MIC3490 only requires a 2.2µF output capacitor for stability.