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TPS61170-Q1: VREF accuracy and drift

Part Number: TPS61170-Q1

Dear support team,

I would need a better understanding of the VREF drift of TPS61170-Q1. In our datasheet we specify @ Vin=3,6V , CRTL=Vin, VREF with 1,204Vmin,  1,229Vtyp, 1,254Vmax.

The use case will be Vin = 5,4V, CRTL = 2,5V PWM @ 100kHz. The following information will be needed:

1) VREF min max figures @ 5,4V and in case CTRL signal has influence what influence does it have?

2) Is this only initial accuracy or does this include the drift over temp, If not what is the drift over temp?

3) What contribution to the min max figures do initial accuracy and drift have?

4) Will temp drift between several parts always be positive or negative?

5) Can the temp drift be approximated linearly in the range of room temp to 85°C?

6) Does the drift already consider long term stability? Or we have to add margin for long term drift?

many thanks

Lutz

  • Hi,


    Here's my reply:
    Vref has nothing to do with the CTRL signal. The Vref accuracy has already include the drift over the temp. "Vref difference" between the different part under different temp will not keep the same, it will changes a little, it is "approximately" linear but just "approximatelly". The drift has consider the long term stability.


    Could you please share the detailed application information for us? Like in what kind of equipment? Which company?Volume? MP schedule?You can send the information to me by email, my email address is helen-chen@ti.com