中圖分類號(hào)：TN433 文獻(xiàn)標(biāo)志碼：A DOI: 10.16157/j.issn.0258-7998.256442
中文引用格式： 郭威，張有濤，國(guó)洪軒，等. 一種寬輸入低紋波電荷泵負(fù)壓電源芯片設(shè)計(jì)[J]. 電子技術(shù)應(yīng)用，2025，51(10)：24-31.
英文引用格式： Guo Wei，Zhang Youtao，Guo Hongxuan，et al. Design of charge pump negative voltage power supply chip with wide input range and low output ripple[J]. Application of Electronic Technique，2025，51(10)：24-31.

Design of charge pump negative voltage power supply chip with wide input range and low output ripple

Abstract： In order to solve the problem of serious electromagnetic interference of inductive power supply chip and large output ripple of capacitive power supply chip, a capacitive power supply chip is designed. The output ripple voltage is lower than 1 mV under high frequency condition with a non-inductance structure, which is close to the inductance power chip. The output voltage of the chip can be adjusted in the range of -16 V to -3 V, and the operating frequency can be changed between 90 kHz and 1 MHz. The circuit is designed and implemented based on 250 nm process. The simulation results show that under the conditions of input voltage of 16 V, output current of 100 mA and operating frequency of 1 MHz, the output ripple voltage is 0.6 mV and output voltage is -14.84 V, and the efficiency reaches 87.1%. When the operating frequency is reduced to 90 kHz, the output ripple voltage is 10 mV, the output voltage is -14.83 V, and the efficiency is increased to 91.9%. The experimental data show that the chip has good adaptability and can meet the needs of various application scenarios.

Key words : cross coupling；low ripple；negative voltage；wide input range