SLUSEJ1 December 2021 TPSM8D6C24
The initial output voltage can be set by the VSEL pin at AVIN power up. As part of power-on reset (POR), the VSEL pin senses both the resistance from the VSEL pin to AGND and the divider ratio of the VSEL pin between B1V5 and AGND. These values program Section 7.6.25, Section 7.6.19, Section 7.6.26, and Section 7.6.21 and select the appropriate settings for the internal feedback divider and precision adjustable reference voltage. Once the TPSM8D6C24 completes its POR and enables PMBus communication, these initial values can be changed through PMBus communication.
The output voltage can be programmed through PMBus and its value is related to the following registers:
The TPSM8D6C24 defaults to the relative format for the following, but can be changed to use absolute format through the PMBus command Section 7.6.18:
Refer to the detailed description of Section 7.6.18 for details.