A semiconductor integrated circuit device having an internal power supply circuit capable of stably maintaining an output level with respect to a load variation

摘要

It is an object of the present invention to provide a semiconductor device having an internal power supply circuit capable of supplying stable internal power supply voltages int and Vcc without increasing the layout area. The differential amplifying circuit 202 in the voltage step-down circuit 109 receives the potential level V of the drain of the transistor P14_OUTTo the reference potential V_REF Dislocation V_OUTThe gate potential of the transistor N12 rises due to the coupling action of the capacitor C2, and the transistor becomes conductive. Therefore, the potential level V_OUT/RTI Conversely, the potential level V_OUTThe transistor P12 is turned on and the potential level V_OUTIs lowered.