• RE: With regards to LTM4644 SVIN

    Hi Parziwal, there is no UVLO for VIN. For the power sequence, SVIN should be given first to power up the control logic before VIN.

  • RE: Error Voltage on FB of LTM4644

    Hello ,Susan

    Problem's  solved , by replacing by a new part .

    Still thank you very much

  • LTM4644

    Hello, ask a question, can LTM4644 work in 1+1+2 mode?

  • LTM4644

    In my application, there are two power supplies :12V/1A & 3.3V/3A . While I need three secondary power rails :①3.8V/1.1A  ②2.4V/1.84A  ③1.3V/4.85A .

    Can the following topology be achieved with LTM4644:

    VIN1:12V →VOUT1: 3.8V;(SVIN1=12V)


  • LTM4644 PGOOD

    LTM4644 在并联输出时 各路PGOOD信号是否还是有效输出的?

  • about the "MIN" current for TRACK/SS1~4 of LTM4644

    good day!

    TRACK/SS1~4 of LTM4644 are used as Output Tracking and Soft-Start Pin of Each Switching Mode Regulator Channel.An internal 2.5µA current source will charge up the external soft-start capacitor towards the INTVCC voltage.

    BUT there is no…

  • LTM4644 INTVCC pin

    I am using a LTM4644 and I would like to add the possibility to control the RUN pin to shut it down from an insulated circuit. For this reason I will add a ISO722x. 

    The question is if I can power the VCC2 of the ISO722x from the INTVCCX pin. Is this output…

  • LTM4644

    Use LTM4644 to output three voltages.The first path is separate, the second path is separate, the third path is parallel to the fourth path, can this be connected?

  • LTM4644


  • LTM4644 enable problem

    1. In one of my project, I am using LTM4644 Step-Down Regulator for FPGA power. I give 5V power to Vin from power supply and I want to get 1V2 – 2V5 – 3V3 – 1V8 outputs; 5V is given to RUN1 – RUN2 – RUN3 – RUN4 pins from power supply. Third (3V3) and…