Power supplying circuit and associated switch controller for non-volatile memory

A power supplying circuit for a non-volatile memory, the power supplying circuit comprising a voltage source and a switching circuit, the voltage source outputting a high voltage, a low voltage and a decoupling signal, the switching circuit comprising a power switch and a switch controller, a first terminal of the power switch receiving the high voltage, a second terminal of the power switch being coupled to an erase line of the non-volatile memory, the switch controller comprising:

• a latch, wherein a first power terminal of the latch receives the high voltage, a second power terminal of the latch receives the low voltage, a first control terminal of the latch is connected with a first node, and a second control terminal of the latch is connected with a second node;
• a first driving stage, wherein a first power terminal of the first driving stage receives the high voltage, a second power terminal of the first driving stage receives the low voltage, an input terminal of the first driving stage is connected with the first node, an output terminal of the first driving stage generates a switching signal to a control terminal of the power switch, and on/off states of the power switch are controlled according to the switching signal;
• a first control stage connected with the first node, wherein the first control stage receives a control signal and the decoupling signal;
• and
• a second control stage connected with the second node, wherein the second control stage receives an inverted control signal and the decoupling signal,
• wherein in a logic phase of a sector erase, the high voltage is equal to a logic supply voltage, the low voltage is equal to a ground voltage, and the control signal is stored in the latch;
• wherein in a transition phase of the sector erase, the high voltage rises from the logic supply voltage to a first voltage, the low voltage is equal to the ground voltage;
• wherein in an erase phase of the sector erase, the high voltage rises from the first voltage to an erase voltage, the low voltage rises from the ground voltage to a second voltage, the erase voltage is higher than the second voltage, and the first driving stage generates the switching signal according to the high voltage and the low voltage;
• wherein the decoupling signal is in a range of the high voltage and the low voltage during the logic phase, the transition phase and the erase phase.