Incorporating the high-speed load response technology QuiCur™ in power supply ICs makes it possible to achieve ideal performance without causing instability in feedback circuits. Not only can the number of external components and the mounting area be reduced by minimizing the capacitance of the output capacitor required by the power supply IC, but linear adjustment of the capacitance and output voltage fluctuations (negative constant proportional relationship) is enabled, ensuring stable operation even when the capacitance increases due to specification changes. This contributes to a significant reduction in power supply circuit design resources by providing stable operation with fewer external components.