Charge pump circuit, chip and electronic equipment

Abstract

The invention discloses a charge pump circuit, a touch chip and electronic equipment. The charge pump circuit comprises a first charge pump module and a second charge pump module. The first charge pump module comprises a first control module, a first output capacitor (Cout1) and a fourth bonding pad (321); the second charge pump module comprises a second control module, a second output capacitor and a fifth bonding pad (326). When the first output capacitor (Cout1) is in a charging state, the second output capacitor (Cout2) is in a discharging state; or when the first output capacitor (Cout1)is in a discharging state and the second output capacitor (Cout2) is in a charging state, the fourth bonding pad (321) and the fifth bonding pad (326) are arranged adjacent to each other. Or when thefirst output capacitor (Cout1) is in the charging state, the second output capacitor (Cout2) is in the charging state; or when the first output capacitor (Cout1) is in a discharge state and the secondoutput capacitor (Cout2) is in a discharge state, a grounding module is placed between the fourth bonding pad (321) and the fifth bonding pad (326). According to the circuit structure, electromagnetic interference is reduced, and the performance of the chip is improved.

Description

technical field [0001] The embodiments of the present application relate to the circuit field, and in particular, to a charge pump circuit, a chip, and an electronic device. Background technique [0002] Currently, integrated circuit chips usually use a charge pump (charge pump) circuit for step-up or step-down processing. The flying capacitor or output capacitor in the charge pump circuit will generate a peak transient current with a duration as short as a few nanoseconds (ns) and an amplitude as high as hundreds of milliamperes (mA) during the charging or discharging process. The electromagnetic field and electromagnetic waves generated by the current will interfere with other circuit modules near the chip, especially the antenna that is extremely sensitive to Electromagnetic Interference (EMI), which will greatly reduce the performance of electronic equipment, so that the designed chip cannot meet the requirements of the application side. . Contents of the invention ...

AI Technical Summary

Problems solved by technology

The flying capacitor or output capacitor in the charge pump circuit will generate a peak transient current with a duration as short as a few nanoseconds (ns) and an amplitude as high as hundreds of milliamperes (mA) during the charging or discharging process. The electromagnetic field and electromagnetic waves generated by the current will interfere with other circuit modules near the chip, especially the antenna that is extremely sensitive to Electromagnetic Interference (EMI), which will greatly reduce the performance of electronic equipment, so that the designed chip cannot meet the requirements of the application side.

Images