• On LT3085 typical app combo: hi-current with hi-efficiency

    Hi,

    In the datasheet of LT3085, here are 2 typical application circuits.

    Page 17:

    Page 22:

    So can they be a conbination? Namely, employ one LT3085 chip plus PNP amplifier, instead of four LT3085 chips parallel. To accomplish a higher current output…

  • LT3085 as adjustable current source

    Hello,

    I'm trying to use LT3085 as adjustable current source. From application note it seems to be very easy:

    My design is as follows:

    AD5272-100 is 100k Ohm resistor controlled through i2c interface.

    I have two issues:

    1. Output current is not…

  • LT3085输出问题

    LT3085输出出现问题,输入电压为7V,set引脚电阻为499k,理应OUT上输出5V左右,但实际上Vout输出6.4V,重复焊了几个不同电路,换了芯片,但是结果还是一样的,更改电阻为510K, 输出也是6.41V,不知道为何,电路图算是比较简单的,应该不会有问题啊,可是我在另外一个板子上焊过一个,用的电位器,但是是正常输出的

  • RE: LT3081 Overload Recovery - Applies to Many LT308X LDOs

    This is how I answer the question posted above:

    There is a text section in the LT3085 datasheet called Overload Recovery that is probably applicable to your scenario with the LT3081.  The image below shows the text section from the LT3085 datasheet:

     

  • RE: LT3085_Vout +10V solution

    Hello Josh,

    the  LT3085 demands for a minimum output current:

    This statement can be found on page 1 in bold letters

    So when your output is not loaded as mentioned the part cannot operate/regulate correct.

    kind regards

    Markus

  • RE: LT3081 SHUTDOWN - APPLIES TO MANY LT308X LDOS

    The easiest way to shutdown the LT3081 is to disconnect its input - the IN pin.  If that is not possible, then I show two other options in the images below.  To make the images, I added some commentary to the Adding Shutdown TYPICAL APPLICATION from the…

  • 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…

  • TAGS LIST: Power Management

    LTM8045
    LTM8049
    LTM4651
    LTM4661
    LTM4686
    LTM4676
    LTM4686-1
    LTM4676A
    LTM4675
    LTM4677
    LTM4678
    LTM8062
    LTM8061
    LTM8052
    LTM8026
    LTM8056
    LTM8064
    LTM8054
    LTM8055
    LTM4600
    LTM4600HV
    LTM4608A
    LTM4604A
    LTM8032
  • RE: LTC2668 initialization issue

    Here is the schematic.  The SPI lines are usually controlled by another board.  I was doing a "smoke test" before attaching the other board.  I tied CS#/LD to 3.3V to OVP to prevent unintended SPI interaction.  My tech looked and found a solder…