Texas Instruments TPS59650 datasheet, a 1.79 MB PDF. The TPS596xx family covers multiphase core voltage controllers used in notebook CPU power designs. A technician consults the sheet for pin functions, enable and power-good timing, and the typical application circuit when tracing why a core rail is missing or a controller runs hot. TI parts usually carry a short top marking instead of the full name, so match the marking table in the document against the chip before drawing conclusions.
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The standard format for schematics, block diagrams, power-sequence charts and service manuals.