Abstract: A transistor load driving circuit characterized in that fast charge/discharge driving can be realized for a capacitive load with variation made between a large load state and a small load state, without breakdown phenomenon for the output transistors. In load driving circuit 1, there is a totem-pole-type load driving circuit 10 and a rise characteristics control circuit 20, which is connected to resistor C.sub.L by coupling capacitor C.sub.1 and acts as a constant-current functional circuit. In the case with a large load, said totem-pole-type load driving circuit 10 can perform high-speed charge/discharge operations for the load electrostatic capacitance C.sub.L. When the value is small for load electrostatic capacitance C.sub.L, the characteristic curve of totem-pole-type load driving circuit 10 becomes too steep, so that the sustain voltage of the transistor decreases, rise characteristics control circuit (20) acts to limit the collector potential of phase-splitting transistor Q.sub.

Abstract: An output control circuit in which the rise and fall times of the output (slew rate) can be properly set respectively, because an electric charge control circuit part is provided to charge or discharge the electric charge to a control electrode of a second switching element at the rise or fall time of the output, and because each operation of the electric charge control circuit part corresponding to the rise and fall of the output is performed independently of the other.