These chips can't be contained to just one step, so here are some more:

STMicroelectronics STB601A0 power management (likely)

Apple 343S00252-A0 power management (likely)

Apple 343S00257-A0 power management (likely)

Apple 343S00248-A0 power management (likely)

Texas Instruments 343S00235 charger IC (likely)

Diodes Incorporated PI3DPX1203 DisplayPort 1.3 4-lane linear re-driver

NXP Semiconductor CBTL610 DisplayPort multiplexer (likely)