A Pseudo-LDO-Assist Charge-Control SIMO Buck DC-DC with 0.02 mV/mA Cross Regulation

Abstract Cross-regulation (CR) suppression is a challenge in single-inductor-multiple-output (SIMO) DC-DC. The pseudo-LDO-assist technology presented to decrease CR of charge-control SIMO Buck DC-DC this paper. With the fast current compensation proposed pseudo-LDO, last DC-output, which used be largest traditional SIMO, could suppressed same level as that other DC-outputs regulated by charge control. Experimental results show 0.02 mV/mA 488 mA load transient, shows 42.86% improvement compared existing SIMO.