• LTC3649 : rail to rail operation

    Hi,

    I need to charge a 5mF capacitor from an input voltage (28V-56V) to the same output voltage.

    I want to use LTC3649 to precharge this capacitor at a constant current (between 1-- 2 A).

    I think to choose RSET= 1.1M Ohm and Cset = 100nF.

    Is-it possible…

  • LTC3649 Top and bottom switch gate charge

    Hi. To calculate a switching loss for LTC3649 I need to know gate charge of top and bottom power switches, but this information is not provided in datasheet. How should I evaluate switching loss?

  • LTC3649 as lab power supply - circuit

    Hello,

    I would like to build proposed lab power supply based on LTC3649. In the datasheet note, there is simple schematic, where I found a diode:

    Is this diode a zenner one with 40V or just simple rectified diode?

    Diode is connected between Iset and…

  • LTC3649 boost capacitor - larger value OK?

    I am designing in LTC3649 for 5-12V input to various (on same board) output voltages: 1.0, 1.8, 3.0, 3.3.

    I do not have any other 100nF capacitors on this board. I am using 2.2uF 25V X5R 0402 capacitor (Murata # GRM155R61E225KE11D) as my all-around general…

  • LTC3649 datasheet circuit fails when powered with load

    Hi, 

    Trying to replicate LTC3649 circuit from datasheet p. 20.  When powering it with no load and with no commanded voltage on TRACK pin - crcuit starts ok, but when powering with load (220 ohm res for test) and  commanded 0.75V on TRACK pin - LTC3649 just…

  • LTC3649:INTVCC is not 3.3V,almost equal to input voltage

    INPUT VOLTAGE is 27V,and set output to 21V,the result  turn out to be 26V,INTVCC is 25.6V,is the chip broken?

  • LTC3649 how do i control the current overshoot when using current limit featuresame problem with LTM8064

    LTC3649 how do i control the current overshoot when using current limit featuresame problem with LTM8064

  • LTC3649: part failing when inductive load switched in and out: which pins to check and then protect?

    Dear Power by Linear,

         I've designed the LTC3649 into a medical device whose tip is connected by a cable that could be two meters long (by my estimate - my customer cannot be more exact.) A footswitch enables a relay which connects or disconnects the…

  • LTC3649 current limit - at shor circuit does not work (is that simulation only or real part too?)

    Hi,

    Trying to simulate downloaded LTC3649_DC2112A.asc and it gives strange result:

    Just added current limit resitor 80k to limit current at 1A. At moderate loads (ie 2ohm) it works as expected. But when output is shorted (~0.1ohm)  simulator shows 4A current…

  • TAGS LIST: Power by Linear

    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