This can be found in the Tube package.In the package 16-SOIC (0.154, 3.90mm Width), there is a version of it.Mounting type Surface Mount is chosen for the device.Temperature -20°C~70°C is recommended for reliable performance.In this case, the device's maximum supply voltage is 5.5V.It makes sense to conclude that for the supplier package of the device that it is 16-SOIC.
BQ2054SNG4 Features
16-SOIC (0.154, 3.90mm Width) package
BQ2054SNG4 Applications
There are a lot of Rochester Electronics, LLC BQ2054SNG4 Battery Chargers ICs applications.