Can we use fault pins of LTC2977 as input and connect it to power good signals from regulator.?

    So if the voltage of a particular regulator connected to fault pin is in desired range,than only next voltage will be enabled by LTC2977.


  • LTC2977 output of PWRGD pin


    I have a question about output of LTC2977's PWRGD pin when I set MFR_PWRGD_EN to 0x0000.

    In this case, there is no channel affecting the PWRGD pin, which is pulling up to VDD33, so PWRGD pin will always remain low logic, is that correct?



    The LTC2977 is fine-tuning the DCDC output.

    When the servo is turned on, if the DCDC output voltage is also quite large with the LTC2977 set value, the DAC output will rise (saturate) to 1.38V.
    If this happens, the DAC output will saturate for a few seconds…

  • LTC2977 VOUT_EN


    I'm a DFAE in Japan. Our customer evaluates LTC2977 and gives me a question. Regarding VOUT_EN[3:0], we don't understand what the purpose of "Output High Voltage Optionally Pulled Up to 12V by 5μA" ? For example, if pulling up at 3.3V, is the idea…

  • Question about formula for getting a sense register & inductor DCR of LTC2977


    My customer asks some questions about getting a sense register & inductor DCR of LTC2977.

    They will monitor a current of DC-DC Power  and use Inductor DCR Current Sensing Circuit. 

    Please refer Page 83 of LTC2977.

    Q1) Would you let me know…

  • LTC2977 Connecting to DC1613A


    I'm designing custom board using LTC2977 and I'd like to put connector to program LTC2977 by DC1613A.

    This board has 5V supply connected to VPWR pin on LTC2977. 

    In this case, is it possible to program LTC2977 using DC1613A and in the absence…



    We are using LTC 2977 in our design for sequencing power monitoring and sequencing.

    When we try to access the IC with the help of DC1513A, we are getting CML_MEMORY_FAULT Error, We tried changing the I2C operating frequency, and followed instructions…

  • LTC2977 power fault configuration

    According to the datasheet, the fault response can be configured to do power down sequence or shutdown all rails immediately. However, can LTC2977 be set up to perform power down sequence when only VPWR (+12V) is under voltage such as normal power off…

  • About LTC2977 VSENSE voltage

    Is there any hardware problem with the following usage?

    The VSENSE * pin is used when there is a time when the voltage below the absolute maximum rating of the pin, 6V, is input when the LTC2977 is not powered (VPWR = 0V). Is there any problem in terms…

  • LTC2977

    After reading the LTC2977, does this device actually allow user to monitor and control up to 8 power supply outputs.
    I'm using eight of AC/DC and DC/DC in the range of 5v to 40v. Both positive and negative voltages.

    The device can track all eight power…