Phase-locked loop device

A phase-locked loop device comprising a phase comparator receiving a reference clock and a feedback clock, a charge pump receiving a Down pulse and an Up pulse from the phase comparator, a loop filter which is charged and discharged by the charge pump, and a voltage control oscillator that outputs a frequency that corresponds to output voltage of the loop filter; which is characterized in that: the phase comparator is installed with a power cut input terminal, which forcibly changes the Down pulse and the Up pulse outputted from the phase comparator separately into a level on one side and a level on the other side when a power cut signal is inputted.