• LT8570 datasheet equations

    Hello, I am designing an inverting boost converter with the LT8570 and created a spreadsheet using the equations on page 24 to calculate max output current.  I set up the inputs to match the circuit diagram shown on that page, but my calculations for output…

  • LT8570

    Hi!

    Got some problems with LT8570 inverter layout picture. Datasheet on page 20 says pin 1 of L1 (with dot) goes on pin 4 of IC (SW).

    But page 26 (schematic of inverting converter) says, that pin 1 of L1 goes on pin 3 (Vin) of IC. Where is correct connection…

  • Layout of LT8570

    Hello, I am making the layout of the PCB for a design using LT8570, the inverting topology is used to generate -15V from 12V.

    I have looked in the datasheet at the layout hints pages 19-20 but I am not sure about the optimal grounding for this circuit…

  • +24V input to LT8570 to generate -15V

    Hi All,

    I am using the circuit given in page number 24 in datasheet "https://www.analog.com/media/en/technical-documentation/data-sheets/85701fa.pdf"

    to generate -15V with 24V as input.

    I am able to measure only -2V after assembly. Also getting…

  • 15V input, using a LT8570 to generate + -53V

    As the title says, can I use the resistors similar to the one above, by replacing the FBX resistors, and the L, C and diodes that adapt to the output voltage to produce +-53V, two voltages. My input is +15V.Thank  you

  • RE: dc-dc-inverter with LT8580

    Hi dulcevita,

    thanks again for your help.
    As the LT8570 is pin compatible to LT8580, I can replace it on my pcb.
    So for now, my question ist answered.

  • RE: LT8330

    I briefly considered a doubler, and especially given the circuit charges an element and draws virtually no current.  In the end, I moved to the LT8570 which, fortunately, has a very nice and apparently tested design for -48V.

    Thanks for the suggestions…

  • RE: LT3905 Sipm Design Review

    Your approach seems sensible. Just know the Fsel tied to ground will lock you into a 1MHz switching frequency.

    Now, since you intend to use this part as a simple boost, know you will only have a few mA of load current at your disposal. If you need more…

  • RE: LTC3872 current limit

    Hello,

    first of all, the LTC3872 is a boost converter which is working in CV mode (constant voltage) Vout.

    This means as long as your circuit is able to deliver the desired output power its Vout of 34,8V will be generated resp. stable, no matter if load…

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