The Texas Instruments TPS65921BZQZ is a power-management IC designed specifically to pair with OMAP application processors in handheld and mobile devices. Its 2.7 V to 4.5 V supply range covers a single-cell Li-ion battery through discharge and charge termination, and the 300 µA quiescent current keeps the idle draw low enough for always-on peripherals.
Package and temperature — layout and environment constraints
Lifecycle reality — obsolete, sourced through independent channels
That means no factory orders, no last-time-buy window — the only supply is through independent distributors holding surplus or pulled inventory.