TPS2115A-Q1 - SWITCHING CHARACTERISTICS of tr "Output rise time from an enable"

Hello,
Can I have help?

Could you please teach me the value of "tr" at Ta=-40~85℃?
  MIN = ?
  MAX = ?

It is OK with rough values.

Regards,
Dice-K

Hello Dice-K,

I've assigned this post to the appropriate applications engineer. He will respond to your question.

Regards,
Karl

Hello Karl,
Thank you for all your help.

I wait for a answer.

Best regards,
Dice-K

Hello Dice-K,

I have looked up the characterization data for the device provided for PPAP.  Below is the characterization for the rise time on the output for the device.

Parameter	Lower Limit	Min	Ave	Max	Upper Limit
tr Rise Time +25C	1	1.306	1.396694	1.5011	3
tr Rise Time -40C	1	1.4096	1.531657	1.664	3
tr Rise Time +125C	1	1.223	1.296926	1.3801	3

Best Regards,

Scott

Hello Scott,
Thank you for your reply.

Why are these MAX values smaller than a TYP value "1.8ms" of the data-sheet?
Are these different from the measurement condition of the data-sheet?

Is it correct that high temperature is faster than low temperature?

Best regards,
Dice-K

Hello Scott,
I don't need measured values, it is OK with rough values.

The page-6 of SBVS124 describes the value at Ta=25℃.
  MIN = 1.0ms
  TYP = 1.8ms
  MAX = 3.0ms

For example, at Ta=-40~85℃.
  MIN = 0.9ms
  TYP = 1.8ms
  MAX = 3.3ms
etc.

Best regards,
Dice-K

Hi Dice-K,

this appears to be the same question asked at the top.  I double checked the PPAP char data and the matrix I put on E2E is the correct order so yes, high temp is faster rise time than cold based on the char data.  The typical in the DS may shift vs the ATE char data due to difference in the bench board for typical vs the ATE test board for production.

Scott

Hello Scott,
Thank you for your reply.

Are public data only the following data?   unit[ms]

MIN          TYP             MAX         Conditions
----------------------------------------------------------------------------------------------------------------------------------------
1               1.8               3                Ta=25℃             VI(IN1)=VI(IN2)=5.5V, RILIM=400Ω, CL=1mF, IL=500mA, Data-sheet-value
No Data     ---               No Data     Ta=-40~85℃     VI(IN1)=VI(IN2)=5.5V, RILIM=400Ω, CL=1mF, IL=500mA, Data-sheet-value
1.306        1.396694     1.5011        Tj=25℃             VI(IN1)=VI(IN2)=unknown, RILIM=unknown, CL=unknown, IL=unknown, Measured-value
1.223         ---               1.664          Tj=-40~125℃    VI(IN1)=VI(IN2)=unknown, RILIM=unknown, CL=unknown, IL=unknown, Measured-value

Please tell me if you know unknown conditions.

Best regards,
Dice-K

Hello Scott,
Do you have any comment?

If you don't have any comment, I don't have other way to submit above data to my customer.

I'm sorry to ask for difficult support.

Best regards,
Dice-K

Dice-K,

If you want to combine -40 and +125C data into the same column you may but by combining char data with spec limits is confusing.  

The test conditions are the same for each of these temps as in the datasheet limit for all three temps I sent.

Regards,

Scott

Hello Scott,
Thank you for your reply.

I am confused.
Though the test conditions are the same as the data-sheet, why are the values of 25C different?

MIN          TYP(AVE)        MAX         Ta=Tj
--------------------------------------------------------
1.000        1.800000        3.0000      25C
1.306        1.396694        1.5011      25C

Best regards,
Dice-K

The datasheet lists the specification limits, not the measured results. What is implied is at 25C all units shipped will be between 1 and 3 ms. To come up with datasheet specs characterization measurements are taken and statistical processes used. That is why the datasheet limits are wider than any of the measured values.

Scott