Disable LT3083

If I want to disable the device LT3083, Vout=0V, is it enough to set the Vin equals to 0V?

Should I have to set the Vctrl=0V?

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  • +1
    •  Analog Employees 
    on Jan 20, 2020 6:42 PM

    Thank you for the post.  VCONTROL = 0V is the best way to turn the LT3083 off - sorry that is not highlighted in the datasheet very well.  If VCONTROL is high, the LT3083 OUT voltage may try to float up.  The parasitic diode that I show in the image below will clamp OUT to a diode drop above IN.  The image uses the Abs. Max. Rating table and block diagram from the LT3083 datasheet and shows how the Abs. Max. Rating indicates a parasitic diode on the block diagram from OUT to IN. 

    LT3083 DS Abs. and Block_3.png

Reply
  • +1
    •  Analog Employees 
    on Jan 20, 2020 6:42 PM

    Thank you for the post.  VCONTROL = 0V is the best way to turn the LT3083 off - sorry that is not highlighted in the datasheet very well.  If VCONTROL is high, the LT3083 OUT voltage may try to float up.  The parasitic diode that I show in the image below will clamp OUT to a diode drop above IN.  The image uses the Abs. Max. Rating table and block diagram from the LT3083 datasheet and shows how the Abs. Max. Rating indicates a parasitic diode on the block diagram from OUT to IN. 

    LT3083 DS Abs. and Block_3.png

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