There is a package for Cut Tape (CT) in which it can be found.There is a 20-WFQFN Exposed Pad package that comes with this item.Mounting type Surface Mount is chosen for the device.Keeping the temperature at -40°C~85°C TA will ensure reliable performance.In order to charge the device, it needs to receive Constant - Programmable current.As you can see, it has 20 terminations in it.The battery pack is set to 4.2V when it comes to the battery.A number of programmable features are available, including Timer.There is 1.2A maximum charging current listed on the device.In theory, it should be able to run on a battery that has a voltage of 5VV.An input voltage of 6V can be applied to the device without damage.The device falls under the Power Management Circuits subcategory.There is 2mA voltage set in Vsup (maximum supply voltage).The power supply for this part is set to 5V.
RT9519AGQW Features
Battery pack voltage of 4.2V Power Management Circuits subcategory 20-WFQFN Exposed Pad package
RT9519AGQW Applications
There are a lot of Richtek USA Inc. RT9519AGQW Battery Chargers ICs applications.