  We study N=2 supersymmetric quantum mechanics of a charged particle on sphere
in the background of Dirac magnetic monopole. We adopt CP(1) model approach in
which the monopole interaction is free of singularity. In order to exploit
manifest U(1) covariance in the superspace formalism, we introduce a gauge
covariant chiral superfield which is annihilated by the gauge covariant
superderivative instead of the usual superderivative. We carry out the
quantization of the resulting system and compute the quantum mechanical
spectrum. We obtain the condition for the spontaneous breaking of
supersymmetries explicitely in terms of the monopole charge and a parameter
characterizing the operator ordering ambiguity. We find that the supersymmetry
is spontaneously broken unless a certain combination of theses quantities
satisfies some quantization condition.
