SPRUI30H November 2015 – May 2024 DRA745 , DRA746 , DRA750 , DRA756
Embedded SRAM LDOs are used to supply power to the split-rail memory arrays. The PRM generates the controls used to select LDO operating mode: on-active, on-retention, or off.
Split-rail type SRAMs are used in the device to implement the larger memories. These SRAMs feature memory array and periphery logic, which are on separate supplies to allow independent power management. Proper memory operation, however, requires the SRAM array voltage never to be operated at a level lower than the SRAM periphery logic.
Memory LDO can switch to on and retention mode:
Memory LDOs Transitions describes the state transition conditions and sequences for the memory LDOs.
The voltage levels associated with the different modes may depend on the device characteristics.