TPS62872-Q1: SIMPLIS Unencrypted Transient and Average Model

Hi, 

Could you please share your simplis schematic so that I can see the problem?
Additionally, could you elaborate what type of simulation are you running?

Best Regards,

Rameen

I couldn't share the screenshot here, but the schematic is similar to the one provided in the design tools and simulation Link. with just a change in Input voltage and capacitors

When I press F11 and change VOUT variable to 3.3V the output voltage is still the same around 0.85V which is not even the value provided by default (0.75V).

Hi, 

I checked the simulation file, it is working correctly. 
Are you performing startup or steady state simulations?

Best Regards,
Rameen

Hi,

I am performing startup simulation.

kind regards,

Hamza

Hi Hamza, 

Please refer to the Application notes in the SIMPLIS model: "C: Application Notes"

"* 3. You must keep STEADY_STATE =1 for AC analysis.

* Four default voltage for start-up can be selected by connecting appropriate resistors to VSEL pins.(Refer Datasheet)"

Additionally, you can find the startup voltage settings in the datasheet. 

Thank you. 

Best Regards,

Rameen