It is included in the Tape & Reel (TR) package for convenience.Among the packages that come with this product, there is one that is 9-WFBGA, WLCSP.Device mounting type Surface Mount is specified.Providing Constant - Programmable current to the device is the only way to charge it.There is a setting of 4.2V for the battery pack.Timer are a programmable feature.On the device, it is listed as having a charge current of 455mA.In order to operate, devices need a maximum supply voltage of 0 volts.It makes sense to conclude that for the supplier package of the device that it is 9-WLCSP (1.55x1.55).
MP2661GC-XXXX-P Features
Battery pack voltage of 4.2V 9-WFBGA, WLCSP package
MP2661GC-XXXX-P Applications
There are a lot of Monolithic Power Systems Inc. MP2661GC-XXXX-P Battery Chargers ICs applications.