need help identifying component....
 

Got a Nikon Coolpix P3 digicam for repair. I see a pitted 8 pin smd
dip package with " D91 04 BU" written on it. Anyone here knows
what the complete part number or prefix might be? The component lies
in the power supply DC-DC section. Pins 4 and 5 are grounded. Pins 1
and 8 seem to be supply points (not connected to each other). A
service manual would help plenty.
Thanks in anticipation,
Jango