LTM4650A 5.5V supply

Hi, I'm using LTSpice and trying to make a LTM4650A 5.5V 50A supply, but I cant get it to work. I cant find a reference design and am not 100% sure what to do with the diff pins when my output is >3.3V.

Since this supply should go up to 5.5V, can AD/LT provide a ref design? Or try simulating it at 5.0V themselves? 

  • 0
    •  Analog Employees 
    on Dec 5, 2019 6:15 PM


    The LTM4650A is available in LTSPICE library. By setting up the system according to the standard LTM4650A demo board DC2603-A, I have got the simulation working with 5.5V output voltage with 50A load. I will send this working simulation to your email on profile for your reference. Regarding the differential pins, simply disconnect DIFFOUT to any VOUTS pins and connect one of the VOUTS pins directly to the output when Vout>3.3V. 

    Hope it helps!