Cxlb74112 cxlb74113 cxlb74114 is a compact PMU that can be applied to mobile power supply. It integrates charge management, charge indication and synchronous boost DC-DC function, especially for small mobile power supply and other portable electronic devices. Built in charging management, charge the battery according to the standard trickle, constant current and constant voltage three-stage charging mode, effectively guarantee the charging safety and battery service life, and ensure the battery to reach full charge. Constant voltage charging accuracy is high, up to ?1%. Built in synchronous boost DC-DC, internal integrated power switch, external only need inductance and capacitance to achieve a complete boost function, without external Schottky diode. With a switching frequency of up to 1MHz, the external inductance of 2.2uh can meet the requirements. Built in short-circuit and over-current protection functions can realize the output short-circuit protection function independently without external switching devices, and can still guarantee the system safety and reliability under the condition of abnormal load access. Drive two LED indicators to indicate the state of charging and boosting output light load respectively