Typical value of supply current is not a reference for power supply sizing, use the maximum supply value for reference.
Typical value of supply current is an indicative value of current consumption which very likely to observe a closer value when measured on a customer application board for the given operating conditions.
Maximum supply current value is the guaranteed maximum value based on Lean 6-sigma techniques. There is no margin needed to add on top of this for power supply sizing under given operating conditions.