This is one of the single-cell battery charger types.
Part Number : SMB358
Function : Battery Charger IC
Package : BGA 30 Pin Ball Type
Manufactures : Samsung
See the preview image and the PDF file for more information.
SMB358 is a single-cell battery charger. It can charge the battery and power the system via the USB/AC adapter input.
The devices are programmable single-cell lithium-ion/lithium-polymer battery chargers designed for a variety of portable applications. The device provides a simple and efficient way to charge high-capacity Li-ion batteries and power the system via a USB or AC adapter input.