FAN5405UCX-ON onsemi

Description: IC BATT CHG LI-ION 1CELL 20WLCSP, Packaging: Bulk, Package / Case: 20-UFBGA, WLCSP, Number of Cells: 1, Mounting Type: Surface Mount, Interface: I2C, USB, Operating Temperature: -30°C ~ 85°C (TA), Battery Chemistry: Lithium Ion/Polymer, Supplier Device Package: 20-WLCSP (1.96x1.56), Charge Current - Max: 1.25A, Programmable Features: Current, Timer, Voltage, Fault Protection: Over Temperature, Over Voltage, Short Circuit, Voltage - Supply (Max): 6V, Battery Pack Voltage: 4.5V (Max), Current - Charging: Constant - Programmable, Part Status: Active.