A very small current generating circuit stabilizes a very small current flowing in a CR oscillation circuit and load driving circuit with an over-current protection function wherein, for example, a discharge time period is determined on the basis of the very small current. The very small current generating circuit includes: a first current route wherein between the internal reference voltage terminal and ground, a resistor is connected in series with an npn transistor; a second current route wherein between the external voltage source and ground, another pnp transistor, another resistor, another npn transistor and still another resistor are connected in series in this order; and a third current route wherein between the external voltage source and ground, and another resistor is connected in series with another pnp transistor. The very small current in the first current route is stabilized by the second and third current routes.