What this PMIC powers and where it lands
The TPS6590379ZWST is a Texas Instruments power-management IC built for processor rails — think application processors in embedded Linux boards, single-board computers, or industrial gateways that need multiple regulated voltages from a single chip.
Package reality for layout and rework
This part comes in a 169-ball LFBGA with a 12x12 mm body — a fine-pitch BGA that demands a four-layer PCB for fan-out and a controlled reflow profile.