Can the LT8609S (Silent Switcher) be used in an inverting buck-boost topology?

I am trying to utilise the LT8609S in an inverting buck-boost topology to generate a negative voltage rail (-5V) from a 4.5-5.5V input voltage supply

The reason for using LT8609S is due to it being a "Silent Switcher" part (reduced EMI). Unfortunately when I simulate this in LTspice, the output voltage is not the expected -5V (closer to -4V).

Is this a limitation with the spice model of the LT8609S or is it indeed that the part cannot be used in this configuration?

LT8609S Inverting Buck Boost circuit

Output voltage

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