SLUSAQ4G October 2011 – September 2022 TPS40422
PRODUCTION DATA
The nominal output voltage of the converter can be adjusted using the VREF_TRIM command. See the VREF_TRIM command description for the format of this command as used in the TPS4022 device . The adjustment range is between -20% and +10% from the nominal output voltage. The VREF_TRIM command is typically used to trim the final output voltage of the converter without relying on high precision resistors being used in Figure 8-1. The resolution of the adjustment is 2 mV. The combination of margining and VREF_TRIM is limited to the range between –30% and +10% from the nominal output voltage. Exceeding this range is not supported.
The TPS4022 device operates in three states that determine the actual output voltage:
These output states are set using the OPERATION command. The FB pin reference voltage is calculated as follows in each of these states.
No margin voltage:
Margin high voltage state:
Margin low state:
where