【PMIC PF8100】How to set BUCK6 output 0.5V voltage

[jianwei_lan]

Dear friend

I want PF8100‘s BUCK6 output 0.5V voltage, how can i do ? 

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BR

your friend

[TomasVaverka]

Hi Gianwei,

0.5V corresponds to 0x16 or 0b0001 0110. This value needs to be written to the SW6 RUN VOLT register (0x79).

Also make sure that SW6_VTTEN = 0 (VTT mode disabled).

Best regards,

Tomas

[john_phillippe]

The VSW6_RUN[7:0] bits need to be set appropriately.  The datasheet describes this.  I believe a value of 0x10 will set the output voltage to 0.5V.  6.25mV steps * 16 = 0.1V.  The starting point of VSW6_RUN is 0x00 which gives 0.4V, so a 0.1V offset = 0.5V.

https://www.nxp.com/docs/en/data-sheet/PF8100_PF8200.pdf

[jianwei_lan]

Dear friend 

can you show me an demo and API about how to change BUCK output voltage ?

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BR

your friend