Hi,
I am simulating LMZ31707 buck converter. I am supposed to get 3.3V at the output but it's showing 23mV.
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Hi,
I am simulating LMZ31707 buck converter. I am supposed to get 3.3V at the output but it's showing 23mV.
Hi,
The voltages being displayed here are the initial DC bias point calculated voltages(please refer image below) and are not accurate representation since the model is a switching transient model.
Regards,
Yitzhak Bolurian
Hi,
When I am running the PSPice schematics, I am getting the bias voltage as output. How can I get the stead-state value. Also I am unable to disable the bias voltage display as it's showing to be not selectable.
Thanks, and Regards
Sumama Hashir
Hi Sumama,
First, I am not quiet familiar with this part.
According to below description, my understanding is leaving ISHARE floating. So could you try to float ISHARE first?
"When unused, treat this pin as a Do Not Connect (DNC) and leave it isolated from all other signals or ground."
Thanks,
Lishuang
Hi,
I disconnected the ISHARE pin and made it floating. But I am getting the same output.
This is the output I am getting.
Regards,
Sumama Hashir
Hi Sumama,
We are looking into this and will get back to you by Tuesday (July 13th).
Best regards,
Yitzhak Bolurian
Hi Sumama,
From the screen shot, it looks like you are simulating only for 10ns.
The device might not have even been enabled yet, let alone allowing it to startup.
Please use simulation time around 1.5-2 times greater than the soft start time.
If you are still not able to see switching in the device, please package the files and share it with us.
The steps for packaging are shared below:
Go to File → Archive Project
Check the following checkboxes:
Library Files
Include TestBench
Referenced projects
Create Single Archive File (click OK)
Regards,
Yitzhak Bolurian
Hi Sumama,
Have you had the chance to look at increasing the simulation time to around 1.5-2 times greater than the soft start time?
Thank and regards,
Yitzhak Bolurian
Hi Sumama,
Since I have not heard from you for a while, I am assuming that the issue is resolved and will close this post.
I you have any other concern or questions, please open a new post.
Thanks and regards,
Yitzhak Bolurian
Hi Yitzhak,
I followed your steps and I was able to simulate successfully.
Thanks for your guidance.
Regards,
Sumama Hashir