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WEBENCH® Tools/TPS62140: Issue while simulating in TINA software

Part Number: TPS62140

Tool/software: WEBENCH® Design Tools

Hello,

I am using TPS62140 buck converter in one of my designs. You can check snap of design as below. All the connections are as mentioned in the datasheet. I simulated the design in Webench, I am getting the results. But when I simulate the same design on TINA, I am not getting the desired results. The output voltage is way less than the desired voltage. Please check below snap from the schematic in TINA.

I performed DV analysis in TINA and results I am getting are much below than desired. Please check below snap.

Desired voltage is 2.5V as per datasheet, whereas I am getting just 33mV. Please help me to resolve this issue.

Regards,

Rewati

  • Rewati,

    Your output capacitance is much too large.  22 uf is the recommended value and you have 3710 uF.  Also, please perform the "Transient Analysis".  Table of DC Rssults at t=0 will not give you an output voltage as the converter has not started up yet.