A peak-current mode boost converter with fast linear transient response

This paper proposes a peak-current mode boost converter with fast linear transient response. To achieve this, a fast linear transient response circuit is proposed, which can directly reflect the change in the input voltage to the voltage on the zero-compensation capacitor of the error amplifier, thus effectively reducing the transient ripple and recovery time of the output voltage. The proposed circuit was simulated using a 90 nm BCD process. Results show that when the power supply voltage changes from 1.8V to 2.4V, the overshoot of the output voltage reduced from 189 mV to 62 mV, and the recovery time reduced from 117μs to 73μs. Similarly, when the power supply voltage changes from 2.4V to 1.8V, the undershoot of the output voltage reduced from 161 mV to 68 mV, and the recovery time reduced from 90μs to 45μs. In addition, the converter only occupies an area of 0.92 mm2. Its quiescent current is only 19 μA and the work efficiency is higher than 90%.