Also FYI -
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The occurrence of the error tends to depend on both the SPICE part models, and on the circuit you used them in.? That model from Analog Devices might work perfectly in every other circuit they tried, but not your circuit.
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That being said, if one must put the blame somewhere, it is most often caused by deficiencies in a part's model, rather than actually caused by the circuit where it was used.? Many SPICE models today - most of them - have functions that are not as well-behaved as they should be.? Discontinuities in those functions or their derivatives are the kinds of things that can lead to "time step too small" errors.
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Andy
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