The XT1861B302MR-G is a DC-DC converter step-up, fixed 1.0V 6.5V 3V, SOT-23-3 package, RoHS compliant, produced by NATIONAL LINEAR. It's used in a wide range of electronic applications. It provides high efficiency, low power loss, over temperature, and over current protection. This electronic part provides a high level of accuracy for power conversion. It operates with an input voltage of 3.0V to 6.5 V and an output voltage of 1.0 V, and its nominal output current is 300 mA. The total power conversion efficiency is up to 93%. The XT1861B302MR-G has a very low quiescent current and is suitable for use in applications needing low power consumption. It features a short circuit protection latch and overcurrent protection as well.