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TPS3808G01Q1EVM: TPS3808E-Q1

Part Number: TPS3808G01Q1EVM
Other Parts Discussed in Thread: TPS3808E-Q1, TPS3808-Q1, TPS3808

Hello,

Please clarify the Tpd with respect to Vt SENSE trip to RESETN asserted delay.

From the spec of the device TPS3808E-Q1

Or TPS3808-Q1

for the typical Tpd delay is 20-30us and maximum of 50us.

Whereas the EVM board, reference Figure 14 : 

The Tpd delay is about 20ms given the SENSE is 0.405V and more if any other V SENSE.

How do you explain the discrepancy between the device spec sheet and measurement of EVM board ?

If so could you confirm the spec is guaranteed of 50us maximum delay ?

Please note that the Tpd delay of MR\ to RESET\  is within the spec according to the measurement of EVM  board.

  • Hi Hyunh,

    It is hard to say when the Vsense crosses the threshold from this image since it is zoomed out. I will replicate in the lab, I will give you an update within 24 hr. As for the 50us maximum delay, Ti guarantees any data and value present in our datasheets.  

    Jesse 

  • Hi Hyunh, 

    Above is a scope image of my bench testing of the TPS3808. During my testing, I have seen the reset sense delay fluctuate between 10us and ~1us.

    The test was ran in room temperature.

    Jesse