In a reference voltage generation circuit, a bandgap reference circuit
(BGR circuit) 1 includes diode element D1 and D2 having different current
densities, three resistive elements R1, R2 and R3, a P-type first
transistor Tr1 for supplying a current to a reference voltage output
terminal O, a P-type second transistor Tr2 for determining a drain
current flowing through the first transistor Tr1 by a current mirror
structure, and a feedback type control circuit 11. The BGR circuit 1 is
connected to a pull-down circuit 2. The pull-down circuit 2 includes a
resistive element R4 and a P-type transistor Tr4 which are connected in
series. The resistive element R4 is connected to a drain terminal of the
second P-type transistor Tr2. The P-type transistor Tr4 has a gate
terminal connected to the reference voltage output terminal O and a
grounded drain terminal. Thus, the number of elements and current
consumption in the start-up circuit which shifts the operation from an
abnormal stabilization point to a normal stabilization point are reduced.