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TPS84621: UVLO Setting of the Buck converter (+12V - +3.3V) TPS84621

Santhana Krishnan T L
Prodigy 170 points
Part Number: TPS84621

Hi,

I am using the TPS84621 Buck converter for my application to generate +3.3V from +12V. I need to use the UVLO feature. How to select the resistor divider network?

Details are not available in the Datasheet. Some fixed values are given in the Datasheet.

Is there any formula for calculating the resistor values based on the UVLO voltage?

  • 0
    TI__Guru 50120 points

    Hi Santhana,

    Section 9.19 in the datasheet details several standard UVLO settings that should apply to most applications. Do you have a particular UVLO in mind? If you care about power consumption, you can set the VIN UVLO to 10V by choosing RUVLO1 as 68.1k and RUVLO2 as 9.31k. 

    Regards,

    Jimmy