• RE: Vout calculation of LT3080

    Thanks for the post.  According to the graph you show above, the customer's output voltage load regulation will be best around room temperature and the error due to load regulation will increase a bit at both extreme cold and hot temperatures.  The output…

  • LT3080 Transistor Count


    I am a reliability engineer currently conducting a trade study which includes the LT3080. Is there a factor of 10 estimate for the number of transistors used in this product? 

  • LT3080 Dropout Voltage

    A customer asks concerning the LT3080:  "We operate at: Vin = 3.3V Vout = 3V, Vcontrol = 5V, output current max. = 200mA. Is this ok?"

    This is a common question so I will answer it myself in a REPLY post.

  • LT3080 Vcontrol Voltage


    The voltage of Vcontrol pin does not have to be same as that of VIN pin?

    I'll use LT3080 on condition that IN=2.5V, Vcontrol=3.3V, OUT=1.8V.  Any problem?



  • LT3080 SET Pin Voltage

    Dear All,

    In LT3080 datasheet, absolute maximum for SET pin Voltage relative to OUT pin is given as ±0.3V. However, In typical applications circuits on "Adding Shutdown" set pin is clamped to output with 1N4148 which has nominal voltage drop of 1V (higher…

  • Adding soft-start for LDO LT3080


    I have a question about the below circuit of LT3080, what is the purpose of D1?

    Is that for discharge C2 when the Vin disappeared? 

    Because D1 will affect the accuracy of Vout, I do not want to add D1。

    Best Regards,



    Field support asked a good question so I will post it here:

    Question:  Won't the OUT to SET abs. max. rating be violated if OUT of the LT3080 is in overload, since SET will program one voltage but the overloaded OUT will be a lower voltage?  For example…

  • LT3080 Exposed Pad Is Soldered to Ground by Mistake

    I get this question frequently so I will post the question and then answer myself:

    "I made a mistake and did not notice that the LT3080 datasheet says for the DD PACKAGE that "EXPOSED PAD (PIN 9) IS OUT, MUST BE SOLDERED TO PCB".  I made…

  • LT3080 Vcontrol pin : separate voltage supply with a dedicated DCDC converter


    I use the LT3080 to regulate from 28.5V  input to 28V output. This dropout voltage of 0.5V is insufficient to supply the Vcontrol pin, which requires a minimum of 1.2V.

    Can you recommend a small DCDC converter able to generate a voltage of about 30…

  • .file_attr 1="1";

    Building a project imported from CCES 1.1.0 to 2.3.0 I get this error:

    [Error ea5004] "C:\Users\G\AppData\Local\Temp\acc3554de5a000\acc3554de5a001.s":659 Syntax Error in :
    .file_attr 1="1";
    syntax error is at or near text '1'.…