Under Voltage Lock Out Circuit

The invention undervoltage lock configured inside the integrated circuit used as a power conversion device discloses (introduce) a-out circuit. Off below a certain level, the input power supply voltage is input, according to the lock-out circuit-under-voltage lock of the present invention, even after a predetermined time-out does not reach the lock-in does not escape out. By this lock-out even if the input power is detected and the voltage continues to change in the vicinity of the hysteresis voltage to operate again occurred for a certain period of time is registered - receive an effect of being able to keep out. There is also significantly reduced risk of causing an effect on other circuits are other malfunctions material is activated by such a holding operation.