Use LT3010 to power LTC4020 INT_Vcc

hello

I see in the datasheet that the LT3010 is used to power INT_vcc. May I ask whether the GND of LT3010 is connected to SGND or PGND

BI1IZF

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  • +1
    •  Analog Employees 
    on Oct 20, 2020 1:47 PM 1 month ago

    I am glad you asked this question because the use of the INTVcc preregulator in datasheet figure 9, figure 10 and the application circuit on p. 39. will not work.  Please use the following circuit instead.  Note that I have connected the ground pin of the LT3012 to PGND. 

    I used the LT3012 which can supply 250mA; the LT3010 can supply 50mA.

Reply
  • +1
    •  Analog Employees 
    on Oct 20, 2020 1:47 PM 1 month ago

    I am glad you asked this question because the use of the INTVcc preregulator in datasheet figure 9, figure 10 and the application circuit on p. 39. will not work.  Please use the following circuit instead.  Note that I have connected the ground pin of the LT3012 to PGND. 

    I used the LT3012 which can supply 250mA; the LT3010 can supply 50mA.

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