OUTPUT DRIVING CIRCUIT AND TRANSISTOR OUTPUT CIRCUIT

摘要

PURPOSE: An output driving circuit and a transistor output circuit are provided to stably operate when a high voltage between a source-drain breakdown voltage and a gate-source breakdown voltage is applied to a gate of an output transistor. CONSTITUTION: A reference voltage generating unit(110) generates a reference voltage. A constant voltage difference is between the reference voltage and a high voltage power source. A level shift unit(130) includes a transistor latch and turns off a first transistor by applying the high voltage power source to the first transistor of a driving circuit or drives the first transistor with the decreased gate potential. A driving circuit unit(150) includes the first transistor and the second transistor. The first transistor is driven according to the control of the level shift unit and applies the high voltage power source to the gate of the output transistor. The second transistor is driven by reducing the potential of the gate of the output transistor. A withstand voltage protection unit(170) includes a first withstand voltage protection unit and a second withstand voltage protection unit.