What the 32 µA quiescent current means for your processor rail
The Texas Instruments TPS659121YFFR is a processor-optimised power management IC (PMIC) that draws just 32 µA of its own supply current. That is the number that separates it from a standard multi-rail regulator — the 32 µA quiescent means this PMIC can sit on a battery-backed always-on rail without draining the cell during sleep or standby. It is designed for systems where the processor core needs sequenced, low-noise rails and the system spends most of its life in a low-power state.
81-DSBGA — the footprint reality
The package is an 81-ball DSBGA, 3.6 x 3.6 mm body, with a 0.5 mm ball pitch. That is a fine-pitch BGA — no two-layer board will route this out. Expect a four-layer PCB with microvias or via-in-pad to break out the inner balls. The supplier device package is 81-DSBGA (3.6x3.6). Surface-mount only; no socket exists for field-swap, so this is a rework-station part, not a field-replaceable one.