As the system is being constantly tuned by the PMU described in Power and clock management, estimating the current consumption of an application can be challenging if the designer is not able to perform measurements directly on the hardware. To facilitate the estimation process, a set of current consumption scenarios are provided to show the typical current drawn from the VDD supply.
Each scenario specifies a set of operations and conditions applying to the given scenario. Current consumption scenarios, common conditions shows a set of common conditions used in all scenarios, unless otherwise is stated in the description of a given scenario. Similarly, Current consumption scenarios, common conditions for LTE modem describes the conditions used for the modem current consumption specifications. All scenarios are listed in Electrical specification
Peripherals typically share one or more power sources. This results in a current consumption that does not scale linearly with the number of peripherals enabled. For example, the current consumption for an application with two peripherals enabled, is not the sum of the currents reported by their individual peripherals.
Condition | Value |
---|---|
Supply | 3.7 V |
Temperature | 25 °C |
CPU | WFI (wait for interrupt)/WFE (wait for event) sleep |
Peripherals | All idle1 |
Clock | Not running |
RAM | No retention |
Cache enabled | Yes |
Condition |
---|
Cat-M1 and Cat-NB1 HD FDD mode |
Good channel, RF cable, no errors in DL/UL communication |
Network response times at minimum |
Output power at antenna port, single-ended 50 Ω |
Modem eDRX current consumption quoted with UICC that allows UICC supply shut down at eDRX intervals. 2 3 4 |
Modem PSM TAU event energy is measured from the modem PSM wake-up until end of RX inactivity time |
All LTE modem current consumption numbers include application core idle mode consumption 5 |