Update on my part ID question - I figured this part must be some type of DC-DC converter, and based on other Focusrite repair threads, guessed it might be a Monolithic Power or OnSemi part. Before posting to the EEVBlog, I also sent a query to Focusrite earlier last month, not expecting to get any useful reply. I did receive a reply from Focusrite tech support this morning - the component in question is a MP2227 QFN10 Step-down regulator 24V, made by monolithic power. Focusrite even offered to send me a replacement part at no charge. My component ID question is solved, and my appreciation goes out to Focusrite's technical support team, I did not expect that level of service.
AJ