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    Ltc3105 does not boost convert the input

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    In my design, I give .250V to 1V as input but I do not get any output. And there is no boost conversion of the input. Help me out in this issue.
    Thanks

    •   Alt21st April 2017, 16:41

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    Re: Ltc3105 does not boost convert the input

    Looks right at first sight, although I'm not sure if the device can achieve nominal output voltage with 1V input and the load resistors. Do you observe any activities at AUX and SW pins?



    •   Alt21st April 2017, 17:40

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    Re: Ltc3105 does not boost convert the input

    Quote Originally Posted by FvM View Post
    Looks right at first sight, although I'm not sure if the device can achieve nominal output voltage with 1V input and the load resistors. Do you observe any activities at AUX and SW pins?
    According to the data sheet the circuit is correct. I have also simulated in LT spice and saw. I get correct output , but in board I do not get output. At AUX I do not get the required output as required in data sheet. The voltage across inductor is same as input.



    •   Alt21st April 2017, 21:04

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    Re: Ltc3105 does not boost convert the input

    At AUX I do not get the required output as required in data sheet.
    Exact voltage?



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    Re: Ltc3105 does not boost convert the input

    Hi,

    To verify the circiut you could just measure the voltage on every single pin and post it here.

    Klaus



    •   Alt22nd April 2017, 10:58

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    Re: Ltc3105 does not boost convert the input

    Quote Originally Posted by FvM View Post
    Exact voltage?
    The voltage that I do get at AUX pin is 200mV.



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    Re: Ltc3105 does not boost convert the input



    The voltage that I get at all the pins are as follows:

    1. At the AUX pin I get 200mV.
    2. At the MPPC pin I get 50mV.
    3. At the LDO pin I get 100mV.
    4. At the Inductor (SW pin) I get the same input voltage which I gave.
    5. At the Vout Pin I get 250mV if I give 1V as input.



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