ABLIC Inc. IC REG CTRLR BOOST SOT23-5 S-8357F65MC-MHYT2U

The product code S-8521D25MC-BXKT2U likely refers to a specific electronic component or device, however, there is no publicly available information about it as the code appears to be proprietary and may only be accessed by authorized personnel with the relevant documentation. It's possible that this code could represent a custom-designed part or a unique identifier assigned by the manufacturer for tracking purposes. Without further context or information from the manufacturer, it is difficult to provide more detailed information about the product.