LMR33640: IBB pspice simulation

Hiroyasu Koike

Part Number: LMR33640

I downloaded LMR33640D reference design and tried IBB simulation.
But the result was different from the attached image.
(VOUT was ramped up, not ramped down)

Do you know why?

5 months ago

0 Andrew Kutzler 5 months ago

TI__Genius 15380 points

Hi Koike-san,

If you set you have to make the IBB file root (do this by right clicking on the folder then making it the root file), you can place voltage probes.

Here I placed one at the output load.

In the simulation window you can see I'm indeed getting a negative voltage:

Thanks,

Andrew

0 Hiroyasu Koike 5 months ago in reply to Andrew Kutzler

Prodigy 120 points

Hi Andrew,

Looks like displayed page was different from the simulation design.
After choosing "Startup_IBB-trand" in upper menu, I could get negative plot.
I didn't even know that.

Power management

Power management forum

LMR33640: IBB pspice simulation