1366 - How do I calculate the power consumption of a Power Manager device?

1366 - How do I calculate the power consumption of a Power Manager device?

The total power drawn by any device is the sum of the individual supply voltages multiplied by the supply currents. Because Power Manager devices operate at a fixed clock frequency, there are no issues with dynamic vs. static power consumption.

For example, consider the case of an ispPAC-POWR1014. From the device's data sheet, maximum values for ICC (ICCa + ICCd), ICCinp, and ICCj, are respectively 20mA, 5mA and 1mA, giving a total of 26mA. If one assumes that all supplies operate at the same voltage, for example 3.3V, total maximum power consumption is 86mW (26mA x 3.3V). The above procedure can also be applied to calculating active power consumption for other members of Lattice Semiconductor’s Power Manager device family.