Semiconductor chip and semiconductor system

A semiconductor chip comprising:

• a driving circuit configured to increase an output voltage on an output node;
• a charge discharge circuit configured to discharge charges accumulated on the output node;
• and
• a detection circuit configured to detect a level of the output voltage and to generate the discharge signal and a voltage control signal based on the detecting;
• wherein, when the detection circuit detects that the level of the output voltage reaches a set level, the detection circuit controls the charge discharge circuit to stop discharging the charges accumulated on the output node and controls the driving circuit to increase the output voltage on the output node according to an external power supply voltage.

A semiconductor chip comprising:

• a driving circuit configured to increase an output voltage on an output node in response to a driving signal;
• a charge discharge circuit configured to discharge charges accumulated on the output node in response to a discharge signal;
• a detection circuit configured to generate the discharge signal and a voltage control signal based on the detecting;
• and
• a driving control circuit configured to generate the driving signal,
• wherein, when the detection circuit determines that the charges of the output node are sufficiently discharged, the detection circuit disables the discharge signal to control the charge discharge circuit to be turned-off and enables the voltage control signal in response to the disabled discharge signal, and
• wherein, when a level of an external power supply voltage becomes greater than a second set level, the driving control circuit enables the driving signal, in response to the enabled voltage control signal, to control the driving circuit to increase the output voltage according to the external power supply voltage.

An operating method of a semiconductor chip, comprising:

• detecting that a level of an external power supply voltage increases greater than a first set level;
• discharging charges accumulated on a output node after the detecting;
• determining that the charges of the output node are sufficiently discharged;
• stopping the discharging of the charges accumulated on the output node based on the determining;
• and
• starting to increase the voltage of the output node after the stopping according to the external power supply voltage.