Aiming at the shortcomings of the traditional charge pump with serious voltage loss and high output ripple, a high efficiency low ripple double-ended output charge pump isproposedin this paper. Based on the traditional charge pump, drive with gate voltage, the charge pump has been structurally improved to reduce the output ripple and achieve positive and negative voltage doubled output, and design a stable and high-driving oscillator circuit. The power supply of the oscillator is self-sufficient from the output of the charge pump, reducing Voltage loss improves conversion efficiency. The charge pump circuit is designed and simulated based on the 0.6 μ
m process. The simulation results show that the improved charge pump's start-up voltage regulation time is only 51 μ
s, and it can achieve the purpose of positive and reverse voltage multiplication at a conventional power supply voltage of 2.8~6 V. Typical power supply voltage 3.3 V, load current 11 mA, output V + up to 6.2 V, V
- up to -6 V, ripple is only 15 mV, has the advantages of high conversion efficiency and regulated output.The performance index is enhanced.