A Switched-Capacitor DC-DC Converter with >77.3% Efficiency and 80 Ns Active Transient Response in 40 μA - 4 mA Load Current Range

Abstract

**Please read the paper on the following link:** https://1worldcontent.com/ess/9142.pdf **Abstract:** This paper proposed a light-load efficient DC-DC converter with dual-lower-bound hysteresis control and frequency control for always-on Internet-of-Things applications. The dual-lower-bound hysteresis control allows the frequency to change dynamically according to the load current, which enhances the light-load efficiency. A fast transient response is also provided for wake-up events in IoT devices. A fully integrated 1/2 capacitive DC-DC converter is implemented in 180 nm CMOS process to demonstrate this concept. The result shows that a 77.3% efficiency is guaranteed over 100x load current ranges and a 80 ns active response time is achieved in 0.04 mA - 4 mA load transient.