• LTC3122 Output Disconnect

    Hi team,

    What triggers the output disconnect function?

    When this happens, I think the PMOS will be turned off and the bulk of the PMOS will be switched to VIN.

    This will prevent the VIN-to-VOUT current through the MIMO body diode.

    Is this correct?

  • [LTC3122] Soft Start reset

    Hi team,

    Isn't the soft start reset if the output is shorted to GND?

    Will not there be an inrush current when recovering from shorted to GND in a short time?

    Best regards,

    T-yoshi

  • LTC3122 Behavior at soft start

    Hi team,

    I am checking the operation using the verification circuit prepared by LTspice.

    I had some questions about the behavior at soft start.

    The verification circuit and waveform are as follows.

    Even though it is operating at a fixed frequency at…

  • LTC3122 Inductor selection

    Hi ADI,

    The data sheet for LTC3122 talks about "inductor current ripple", "maximum inductor current" and "peak inductor current". However, there is no text on how to calculate any of them. Is it safe to assume that the text and formulas regarding inductor…

  • LTC3122 - variable output voltage

    I would like to use the LTC3122 boost converter in an application where I need a variable voltage level between 5 and 12V.  The input voltage will be between 1.8V and 4.2V.  I was thinking of placing a Maxim MAX5419 digital potentiometer in the R2 position…

  • LTC3122 断开电源后,滤波电容泻荷慢

    原理图如上图所示,VM连接唯一的负载是H桥,当VBATOUT物理断开时,由于H桥关断,因此滤波电容上的VM只能从反馈电阻R16和R21续流,由于R16和R21非常大,因此VM电压下降非常慢,需要好几分钟。而且因为VIN物理断开了,且该芯片内部MOS没有寄生二极管,因此不能从电源端放电。

    C19和C26是根据仿真软件补偿做的,中途把这两个电容拆掉过,也任然是上述情况。

    上述分析如有问题,请指正。

    不知有何好办法能让VM快速降至0V。

    我想了几个办法

    1.减小反馈电阻。

    2.加一个固定的阻性负载。

  • What could cause the LTC3122 to consume 65uA in ShutDown mode?

    I have inherited a circuit where it appears that the LTC3122 sometimes fails to shutdown fully (< 1uA) when the SD input is held low and instead continues to consume ~65uA. 

    In the screen shot below:-

    1. Current into the LTC3122 sub-circuit (Showing 65uA…
  • RE: LT1618 - Drop in output current w.r.to the in Input voltage

    Hello,

    then please have a look on the LTC3122, it operates synchronously (no external diode, higher efficiency)) and  has a sufficient current limit of 2.5A(min), 3.5A(typ).

    https://www.analog.com/en/products/ltc3122.html

    kr

    Markus

  • RE: Problem with the ADP1613

    Hello Nasib,

    in all basic Boost-Converters Vin path is not isolated from Vout, even when EN/Shutdown applied.
    Current flows over Inductor and Diode to Cout, thus Vout will be ~ Vin. 
    Again this is valid for all known basic boost converters, a physical fact…