Cxlb73154 is a perfect linear power management chip with constant current / constant voltage for single-chip lithium-ion battery. Its thin size and small outer package make it convenient for portable application. What's more, the cxlb73154 is specially designed for USB power supply specifications. Due to the internal MOSFET structure, external resistors and blocking diodes are not needed in application. The charging voltage is limited to 4.2V, and the charging current is regulated by external resistance. After reaching the target charging voltage, when the charging current drops to 3 / 10 of the set value, the cxlb73154 will automatically end the charging process. When the input terminal (plug or USB power supply) is unplugged, the cxlb73154 will automatically enter the low current state, and the battery leakage current will drop below 1 μ a. The cxlb73154 can also be set to stop working to reduce the power supply current to 25 μ a. The unique internal patent structure of cxlb73154 ensures that the chip will automatically enter the protection state when the battery is connected reversely, and ensures that the IC will not be broken down, resulting in the battery self discharge accident. At the same time, ensure that the ESD capacity of cxlb73154 reaches 6kV (HBM). Other features include: charging current monitoring, input low voltage lockout, automatic recharging, full charging and start charging signs