A new control technique, current referenced pulse train (CR-PT), applied to switching dc-dc converter is proposed and analyzed in this paper. By sensing and comparing the output voltage and the load current at each switching cycle, an appropriate pulse is selected from among several preset pulses as an active control signal of converter. A buck converter is taken as an example to illustrate the principle, the application, the regulation, the steady state performance and the transient performance of CR-PT control scheme. The study results show that the CR-PT control enjoys the fast transient response, the convenient implementation and the stability, and the steady state performance of CR-PT control is much better than that of pulse train control.