A self-regulating negative charge pump using eight-phase clock for a wide range of load current is presented. The eight-phase clock is generated by DLL to reduce the ripple voltage and the area of decoupling capacitance. Zero-reversion loss topology is used to eliminate reversion loss. The self-regulating system is proposed to adjust the driving capacity of the circuit according to the load current, making the output voltage stable for a wide range of load current. The result shows that the decoupling capacitance is reduced by 95.6%. The output voltage stays stable around -380mV with the load current from 40mA to 70mA.