Power supply

The nRF9160 has a single main power supply VDD, and the internal components are powered by integrated voltage regulators. The PMU manages these regulators automatically, no voltage regulator control needs to be included in application firmware.

General purpose I/O supply

The input/output (I/O) drivers of P0.00 - P0.31 pins are supplied independently of VDD through VDD_GPIO. This enables easy match to signal voltage levels in the printed circuit board design.

Figure 1. GPIO supply input (VDD_GPIO)
GPIO supply input (VDD_GPIO)

The I/Os are supplied via VDD_GPIO pin as shown in figure above. VDD_GPIO pin supports voltage levels within range given in table Operating conditions