A compact fast-transient charge-pump boost converter using hysteretic compensated techniques

A compact charge-pump boost converter with fast transient response and high efficiency is presented in this paper. One inherent advantage of charge-pump boost converter is its fast transient response for load variation, and the other is current stress on the output capacitor of the charge-pump boost converter smaller than conventional boost converter. In order to improve the transient response, hysteretic compensated technique is chosen. The proposed converter was fabricated with a 0.35-μm CMOS process. The chip area is 1309μm × 1496μm. With an input voltage of 3.3V, the output voltage can be regulated from 3.6V to 5.1V. Furthermore, it achieves the peak efficiency of 93.2% under the condition of load current I
_OUT
=60mA. Experimental results demonstrate that transient response of this work is faster than other state-of-the-art designs. The measured transient response is only 4μs when the load current changes from heavy load to light load and vice versa.