• RE: LT3080 Dropout Voltage

    The customer's VCONTROL is high enough above VOUT that there is no dropout voltage concern for VCONTROL.

    The image below shows how the specification for VIN Dropout Voltage from the datasheet Electrical Characteristics table relates to the Dropout…

  • RE: LT3080 Vcontrol Voltage

    Thanks for the post.

    VCONTROL and IN can be separate voltages on the LT3080.  In most cases, the LT3080 can do IN=2.5V and VCONTROL=3.3V to 1.8VOUT.  According to the datasheet Electrical Characteristics table, the VCONTROL Dropout Voltage Max. is 1.6V…

  • LT3080 SET TO OUT ABS. MAX. IN OVERLOAD

    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…

  • RE: LT3080 SET Pin Voltage

    Thanks for the post.  The discrete 1N4148 from SET to OUT in the application example you cite - shown in the image below - protects the LT3080 by shunting transient overload current from inside the LT3080 to the external  clamp diode instead.  The discrete 1N4148…

  • ARAD Supported Parts as of 2020 January 8_0

    LT1074
    LT1076
    LT1076-5
    LT1082
    LT1083
    LT1083-Fixed
    LT1084
    LT1084-Fixed
    LT1085
    LT1085-Fixed
    LT1086
    LT1087
    LT1173
    LT1268
    LT1269
    LT1270
    LT1271
    LT1432
    LT1432-3.3
    LT1500
    LT1501
    LT1572
    LT1932
    LT1937
    LT3003
    LT3015
    LT3030
    LT3061
    LT3062
    LT3063
    LT3080
    LT3080-1
    LT3081
    LT3082
    LT3083
    LT3085
    LT3086
    LT…

  • 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

    Hi,

    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…

  • RE: LTM 8067 Outputs Oring

    Hi

    Tying the outputs of 2 LTM8067s together will not result in current sharing and may result in instability. I would suggest using 2 LTM8057s, which have more output capability, each followed by an LT3080-1 for current sharing.

  • RE: LTM8067 modules ORing

    Hi

    I would not recommend connecting LTM8057 outputs together; they are unlikely to share well and instability is likely. For this requirement I would consider 2 LTM8057s, which have a bit higher output capability, followed by an LT3080-1 on each for current…

  • RE: LT3081 floating reg as battery charger?

    OK, guess, I'll go it alone on this - looking into the online problems with these parts, such as LT3080, it might be best for me to steer away from LT308X parts. Pity as they held some promise.

    But before I completely give up on LT308X parts maybe…