The part number LT8648 is a series number for part numbers in the DigiKey catalog. Those numbers are LT8648SEV#PBF, LT8648SJV#PBF and LT8648SHV#PBF. Also there is a Evaluation kit available DC2841A.
For more info on this product please reference the links above or the datasheet below: https://www.analog.com/media/en/technical-documentation/data-sheets/LT8648S.pdf
And See the manufacture website linked below for additional info: LT8648S Datasheet and Product Info | Analog Devices