This part is a kind of semiconductor called BD6370GUL.

Function of this product has 5-Channel System Lens Driver.

Manufacturers : ROHM

Image and pinout :

Some of the text within the PDF file :

Datasheet Motor Drivers for Digital Still Cameras 5-Channel System Lens Driver for Digital Still Cameras BD6370GUL General Description The BD6370GUL is a motor driver that integrates 3 Full-ON or Constant-Voltage type H-bridges, 1 Constant-Voltage or Linear Constant-Current or Full-ON type H-bridge and 1 Linear Constant-Current type H-bridge. The device can drive one stepping motor for auto focus, and DC motors for zoom and iris. It is therefore possible to drive another stepping motor for either zoom or iris, because it has the system to drive 6-channel H-bridges exclusively. Features  Low ON-Resistance Power CMOS Output  Drive Mode Switch Function  Serial Interface 3-line Bus Control  Exclusive 6-Channel Drive Function  6-Bits D/A Converters for Constant-Voltage and Cons [ ... ]

BD6370GUL PDF Datasheet Download