Efficient Peak Current Management In A Multi-Die Stack

A method, comprising:

• receiving a command to enter a next operation at a device, the command received from a controller which is external to the device;
• determining an internal state of the device based on state machine sequencing;
• determining a difference between an estimated current consumption of the next state and an estimated current consumption of a current state;
• decreasing a system specification current by the difference to provide an adjusted system specification current;
• providing a comparison value based on the adjusted system specification current;
• comparing the comparison value to a value of a load bus, the load bus shared by multiple devices;
• and
• based on the comparing, deciding whether to enter the next state.

An apparatus, comprising:

• means for providing power to a set of devices using a common power supply line;
• means for connecting contacts of each device of the set of devices with one another;
• and
• means for instructing a device of a set of devices to transition from a present state to a next state, wherein the next state consumes more current than the present state, and the one device, to determine whether the power is sufficient to allow the device to transition from the present state to the next state, is configured to generate a comparison value based on a system current specification and an estimated current consumption for the next state, and compare the comparison value to a value of the means for connecting.