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TPS55332 RST_TH

Mike, Jung
Prodigy 230 points

Dear TI comunity member.

 

I don't understand TPS55332 RST_TH value 0.768V(min) to 0.832V(Max.) in datasheet page 3.

In datasheet page 17 application information design guide,

I want to know how to calculate or measure this value.

 

I have additional question.

TPS55332 RST pin pull up voltage  is output voltage(Vreg)

please refer to datasheet p..5_Functional Block Diagram.

if it connect the u-com RST pin, high level voltage is very high.

it connet directly 5V or 3.3V, is it problem?

or How is connetcted the RST pin between u-com and TPS55332?

 

Thanks & Best Regards.

  • 0
    TI__Genius 13700 points

    Hello,

    If you look at the internal block diagram on Pg. 5 of the datasheet the RST_TH pin connects to the comparator with the 0.8V reference. The range of 0.768 - 0.832 just gives the variability of that reference and probably accounts for manufacturing variability and variation from time and temperature but it should have a nominal value of 0.8V which is better than 5% accuracy.

    Since this feature is is most likely used for reseting the device if the output droops this sort of accuracy should be sufficient for most applications.

    I am not sure I understand what you mean by u-com, is that another term for the device ground? If you are concerned about what voltage this pin can withstand the listing of recommend max values show 5.25 for this pin.

    Let me know if there are any questions.