Flyback converter with voltage control mode on chip for portable applications

This paper introduces a compact, low power and submicron integrated DC-DC flyback converter designed for generating a constant desired output voltage. The proposed topology is designed to operate in continuous current mode operation at 1.25MHz. A PWM control scheme based on triangular waveform modulation is presented. The converter switch and voltage mode control system is fabricated in a standard 0.35mum CMOS technology. Energy storage and power isolation are off-chip. Synchronous rectification topology using MOSFET is implemented. The converter with voltage control mode is observed to generate a DC voltage of 3.3V with 0.08 ripple using CADENCE simulations