Power supply

nRF9151 SMA DK Hardware

The Development Kit (DK) has a flexible and configurable power supply system to allow software development and testing using different power sources and to facilitate accurate power consumption measurements.

The nRF9151 SMA DK is powered by either of the following sources:

  • USB connector J6 (5 V)
  • External supply on pin VIN 5V of connector P20

The DK is primarily powered by 5 V from the USB connector J6. Alternatively, the DK can be powered by the VIN 5V pin located on the P20 header. Both sources support voltages in the range of 4.0 V to 5.5 V with a nominal voltage of 5 V. The DK must be powered by only one source at a time.

Note: By default, a jumper is placed between the VDD_5V and VDD_nRF pins on connector P22. This ensures power supply to the nRF9151 System in Package (SiP).
Figure 1. Power supply options
nRF9151 SMA DK power supply options

By default, the nRF9151 SiP is supplied from USB through a jumper. To supply other power domains on the board, nPM1300 Integrated Circuit (IC) is used. The output voltage of the nPM1300 can be controlled through the board controller. The startup voltage for BUCK1 can be set with resistor R36 and for BUCK 2 with resistor R37.

For more information, see Board control and Output voltage selection in nPM1300 Product Specification.

Figure 2. Power management solution