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Minimized Transient and Steady-State Cross Regulation in 55-nm CMOS Single-Inductor Dual-Output (SIDO) Step-Down DC-DC Converter Yu - H u e i L e e, Student Member , IEEE, Tzu-Chi Huang , Student Member , IEEE, Y ao-Yi Y ang, Student Member , IEEE, Wen-Shen Chou
提出一种55nm CMOS单电感双输出降压转换器，有效降低稳态和瞬态交叉调节。
55nm CMOS, 1.44mm², 91%峰值效率
单电感双输出降压转换器交叉调节能量分配CMOS
▸创新点1：双模能量传输方法减少交叉调节（系统创新）。该方法通过动态切换能量传输模式，有效降低了稳态输出电压纹波和负载瞬态响应中的交叉调节，提升了系统的整体性能。
▸创新点2：自动能量旁路机制提高效率（电路创新）。该机制在允许的输出电压纹波范围内，自动减少能量传输路径的数量，从而提高了转换效率，同时保证了电压的稳定性。
▸创新点3：低电压能量分配控制器保证良好稳压（系统创新）。该控制器通过精确的能量分配，确保了双输出端口的电压调节和低输出电压纹波，适用于高效SoC集成。
▸创新点4：55-nm CMOS工艺实现高集成度（工艺创新）。测试芯片在55-nm CMOS工艺下实现，面积仅为1.44 mm²，峰值效率达到91%，展示了高集成度和高效能。
Abstract
A single-inductor dual-output (SIDO) step-down DC-DC converter with contin uous conduction mode (CCM) oper- ation is proposed to achieve an area-ef ficient power management module. The low-voltage energy distribution controller (LV-EDC) can simultaneously guara ntee good voltage regulation and low output voltage ripple. With the proposed dual-mode energy de- livery methodology, cross regulation in steady-state output voltage ripple, which is rarely discussed, and cross regulation in load transient response are both effectively reduced. In addition, the energy mode transition operation helps obtain the appropriate energy operation m ode using the energy delivery paths for dual outputs. Moreover, within the allowable output voltage ripple, the automatic energy bypass (A EB) mechanism can reduce the number of energy delivery paths, thereby ensuring voltage regu- lation and further enhancing ef ficiency. The test chip, fabricated in 55-nm CMOS, occupies 1.44 mm and achieves 91% peak efficiency, low output voltage ripple, and excellent load transient response for a high-ef ficiency system-on-a-chip (SoC) integration.