Charge pump device and voltage-stabilizing method thereof

Abstract

The invention provides a charge pump device which comprises a charge pump, a voltage-stabilizing capacitor and a module, wherein the charge pump precharges the voltage-stabilizing capacitor in a write operation preparation stage; the voltage-stabilizing capacitor is connected with the charge pump through the switchover control module; and the switchover control module controls the connection and disconnection of the voltage-stabilizing capacitor and the charge pump. Correspondingly, the invention also provides a voltage-stabilizing method of the charge pump device, and the charge pump device comprises the charge pump and the voltage-stabilizing capacitor. The voltage-stabilizing method comprises the following steps: precharging the voltage-stabilizing capacitor at the write operation preparation stage; disconnecting the voltage-stabilizing capacitor and the charge pump to promote the voltage of the charge pump when a web signal is at low electrical level; and connecting the voltage-stabilizing capacitor and the charge pump when the voltage of the charge pump is promoted to a reference voltage. The rising time of output voltage and ripple wave phenomenon of the charge pump can be optimized simultaneously, under the condition of not influencing the reduction of ripple wave phenomenon, the rising time can be reduced, thereby improving the integral performance of a storage system.

Description

technical field [0001] The invention relates to the technical field of semiconductor storage, in particular to a charge pump device and a voltage stabilizing method thereof. Background technique [0002] In recent years, during the rapid development of semiconductor memory, advanced memory such as DRAM, EEPROM, and FLASH has the advantages of high density, low power consumption, and low price, and has become a storage device commonly used in computers and mobile communication terminals. [0003] In semiconductor memory, the charge pump is a circuit module that provides high voltage. The storage system uses the high voltage output by the charge pump to write data into the storage module. figure 1 is a circuit schematic diagram of a conventional charge pump device, figure 2 for figure 1 The signal timing diagram of the charge pump device in Fig. However, due to the delay in the output path, the output voltage will have disorderly fluctuations, the so-called "ripple" noise ...

AI Technical Summary

Problems solved by technology

[0006] The problem to be solved by the present invention is to provide a charge pump device and its voltage stabilizing method, which avoids increasing the rise time of the voltage stabilizing capacitor and improves the problem of reduced system working efficiency

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