LT8315 non isolated buck application

I am trying to simulate non isolated buck converter with LT8315 ic given in  datasheet as  application example of LT8315 in LTspice software. the output is not regulated and does not give 12 volts as per given design . could you please tell what could have gone wrong . what is the need of diode D4 zener   here? if i dont put the diode D4 then output wont be regulated ?  what should be the transient profile for this simulation  ?  a 100 ohm resistor(12/0.120) at the output instead of Diode D4 does not work.

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    •  Analog Employees 
    on May 30, 2018 4:18 AM

    Hi,

    I don't have any problem for this circuit simulation. See the picture below.

    It does not need D4 zener which clamps Vout at no load. Just put a 100ohm resistor at the output should be fine.

    If you still have simulation problem, please contact our local FAE.

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  • 0
    •  Analog Employees 
    on May 30, 2018 4:18 AM

    Hi,

    I don't have any problem for this circuit simulation. See the picture below.

    It does not need D4 zener which clamps Vout at no load. Just put a 100ohm resistor at the output should be fine.

    If you still have simulation problem, please contact our local FAE.

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