Slope Compensation and Bifurcation in a DC-DC, Single-Input, Multiple-Output, CMOS Integrated Converter Under Current-Mode and Comparator-Based Hybrid Control

Single-Input, Multi-Output (SIMO) converters present significant challenges when operated under current-mode control, due to their strongly non-linear dynamics and susceptibility to bifurcation phenomena. To mitigate the effects on the converter’s steady-state, a double slope compensation solution is proposed. The compensation parameters play a critical role in shaping the system dynamics and rejecting the susceptibility to bifurcation. This paper proposes a detailed analysis methodology to investigate the design parameter space regarding the slope compensations with respect to bifurcation phenomena. The approach is validated on a CMOS integrated converter, where theoretical predictions are compared to the simulation results of a full transistor-level model of the circuit.