Power supplay requierments for NRF52832

[ahia]

hi

i didn't manage to find detailed requirements on the voltage from the chip. in the spec i see voltage range of :1.7-3.6v but its not enough data for designing converter , (i am designing a converter not using one from the shelf) data i need for example is :

• maximum continues current that the chip can consume
• Peak currents
• Allowed ripple (Pk-Pk voltage ) , ripple frequency .
• PS load regulation , line regulation
• Voltage rise time
• Voltage fall time
• do we need to discharge the Vcc capacitor after shutdown

thanks ahia

[Øyvind Karlsen]

Hi,

The max continous current is when the radio is transmitting and the CPU is running alongside a slew of peripherals, for calculation use a value on order of 14-20 mA depending on how many peripherals you want to run. This is also the peak current.

Ripple should be below 100 mV pk-pk.

Load regulation, rise and fall time is determined by the power on reset module, electrical speficication here. Make sure to power different parts of your PCB through a star node, and add a sizeable capacitor there to prevent voltage drops.

Vcc capacitor should be discharged.

Best regards,

Øyvind

[ahia]

hi Øyvind

1. thanks for your answer
2. what do you mean by "Vcc capacitor should be discharged" , is it when turning off the chip? what is the discharge rate ?

thanks ahia 3.

[Øyvind Karlsen]

Discharge rate depends on the state of the chip. In system off the device consumes very little current and the discharge time will be long.