A CMOS PWM boost power converter with feedforward and feedback control for micro-sensor applications

This paper proposes an introducing a feedback control into the dc-dc PWM boost converter with feedforward control, the integrated control circuit can adjust the duty ratio of the converter following the variation of the input voltage and the output load current to get high power conversion efficiency and stabilize the output voltage. The circuit structure of the voltage-mode is relatively simple and only requires a voltage sensing circuit. The converter requires a maximum voltage selector circuit to convert the potential Bulk terminal of the power PMOS and is designed and implemented by using the TSMC 0.18μm 1P6M CMOS Process. Simulation results show that, the boost converter having 1.055×1.077mm² chip size with power efficiency about 93%. This chip can operate with input supply voltage from 1.2V to 1.6V, and its output voltage can stable at 3.3V and less than 37mV ripple voltage at maximum loading current 100mA for micro sensor power module or energy harvesting applications.