Patent ID: 11972807
Assignee: SANDISK TECHNOLOGIES, INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 11:
12. A method for operating a charge pump, the method comprising:
operating the charge pump in a first regulation mode while an output voltage of the charge pump is ramping to a threshold voltage, including:
determining a target duty cycle based on an output voltage of the charge pump;
generating a random duty cycle clock signal having an average duty cycle over a time window that is the target duty cycle that corresponds to a target input current of the charge pump; and
providing a first clock signal that is based on the random duty cycle clock signal to a clock input of the charge pump to regulate input current of the charge pump;

operating the charge pump in a second regulation mode after the output voltage of the charge pump crosses the threshold voltage, including providing a second clock signal to the clock input of the charge pump to regulate the output voltage to meet a target voltage; and
providing the output voltage to a word line of a memory structure while operating the charge pump in both the first regulation mode and the second regulation mode, wherein the word line connects to memory cells.