nRF21540 EK power supply

The nRF21540 EK has multiple power options.

The power options are the following:

VDD pins on P5
VDD pins on P7

Figure 1. Power supply option P5

nRF21540 EK power supply option VDD pins on P5

Figure 2. Power supply option P7

nRF21540 EK power supply option VDD pins on P7

Table 1. nRF21540 EK power source
Power source	Voltage level
VDD	1.7 V–3.6 V (same as GPIO pin voltage)

The VDD for the nRF21540 EK must have the same voltage as the General-Purpose Input/Output (GPIO) pins used to control the nRF21540 through the pin control interface/SPI interface available on the Arduino headers.

Note: Nordic recommends a maximum current input of 0.5 A.