• LTM4646 Schematic help review

    Hi there,

    we newly import LTM4646 into our project for the frst time. To be careful, we would like to ask for asisting review. Insight of LT/ADI expert will be appreciated. .

    SCH as PDF attached, and Load conditions are text-noted nearby the output port…

  • LTM4646 Multiphase Operation

    Hi,

    I'd like to confirm the number of Multiphase of LTM4646.

    According to the data sheet page 11, Up to 6 phases can be cascaded to run simultaneously with respect to each other

    by programming the PHASMD pin to different levels.

    But on page 14…

  • LTM4646 transient response

    Hello,

    I want to power the VCCINT (0.85V) of a Xilinx FPGA. I intend to use the LTM4646 regulator in dual mode. However, I see the 1V Single Phase Single Output  Load Transient Response in the datasheet and it's 33mV undershoot on Vout. Which in this…

  • LTM4644 & LTM4646 minimum output current

    Hello,

    I'm investigating the devices LTM4644 & LTM4646 as a solution to power a Zynq MPSoC device. Thanks to the multiple output capability, it'd be a nice solution.

    However, power analysis from tools and datasheets from Xilinx show various…

  • LTM4646 feedback divider

    In datasheet first output uses one internal resistor and one external resistor for feedback divider. Second output uses one internal resistor and two parallel external resistors for feedback divider. Is there any reason for using two parallel resistors…

  • LTM4646 LTSPICE Model in parallel

    Hi,

    I'm running an LTSPICE simulation of 2 LTM4646 devices.

    Vout 1 and 2 of the first device and vout 2 of the second device are tied together to supply sufficient current. 

    Is it possible to simulate three device outputs in parallel using the LTSPICE…

  • ltm4646 no output voltage. Schematic help.

    There is no output voltage on both channels, but there is voltage on the output of powerGood. Could this be a consequence of a forgotten resistor on the Rfreq pin?
    I don’t understand how PG can be, but there is no output voltage.

  • LTM4646, LTM4622 and LT3070 Schematic help review

    Hi there,

    we newly import LTM4646, LTM4622 and LT3070 into our project for the frst time. To be careful, we would like to ask for asisting review. Insight of LT/ADI expert will be appreciated. .

    SCH as PDF attached, and Load conditions are text-noted nearby…

  • LTM4646 - power outputs shorted to GND net

    Hello,

    I made a PCB using an LTM4646 chip to generate 1.5V and 3.3V from a 12V supply.

    All three of the power nets, 12V, 3.3V and 1.5V are shorted to the GND net in the finished board.The PCB manufacturer checked them out with an X-Ray to verify the issue…

  • capacitance of SYNC pin of LTM4646 and LTM4622

    Hi there,

    we use 10 pcs of  LTM4646 and 10 pcs of LTM4622 on a big power system. System requires External Synchronization Clock (800KHZ) for all DC/DC.

    Now ONLY ONE sync clock 800KHZ is generated from FPGA, and feed to 20 DC/DC in daisy-chain topology. The…