Datasheet in PDF form, 1.88 MB, named BQ738, most likely the Texas Instruments BQ24738 notebook charger controller under its abbreviated package marking, though the name alone does not confirm it. Chips of this family handle adapter detection, power path switching and battery charging on laptop boards. The document lists pin functions, operating conditions and the typical application circuit. Use it to measure pins when diagnosing no-charge or no-power faults, and verify the top marking on the chip matches before relying on it.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @ic_mosfet_pdf_datasheets. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.