Devices and techniques for arbitrating operation of memory devices in a managed NAND memory system to conform the operation to a power budget. In an example, a method can include enabling a subset of memory die of a memory system having multiple memory die, starting an active timer for each active memory die, initializing execution of a buffered memory command at each active die based on a timestamp associated with the buffered memory command, and disabling a first memory die of the subset of memory die when the active timer for the first die expires to maintain compliance with a power budget of the memory system.