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TPS40140 : Convergence problem when trying to simulate with TINA

Other Parts Discussed in Thread: TPS40140

Hi,

I am using TPS40140 for converting 12V to 1.8V  in our design. To conclude on the design and various component values, I want to simulate the circuit in TINA. Using the reference circuit provided by TI for TPS40140 for 1.5V, I had my circuit designed as per the requirements.

When trying to do the Transient analysis, an error saying "Convergence Problem.Check the analysis parameters"  occurred. I tried changing the parameters but of no use. The error keeps on repeating for different parameters. 

Can anyone suggest how to resolve this issue. The schematic of my design is attached here.

Thanks.