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Power management in portable devices demands small size, low cost as well as long battery lifetime, which in turn drive the development of single-inductor multiple-output (SIMO) converters. Due to the battery voltage variation during usage and the wide-range dynamic voltage scaling (DVS) applied for power reduction, high-efficiency buck-boost conversion is required to extend the battery lifetime....
This paper proposes a novel fly capacitor method for single-inductor dual-output (SIDO) switching converters to reduce the output ripples and spikes. An adaptive common-mode control is presented to suppress the cross regulation problem. The converter can automatically switch between pulse-width modulation (PWM) and pulse-frequency modulation (PFM) control to improve the efficiency. The SIDO converter...
An average current mode controlled single-inductor dual-output (SIDO) buck converter is presented. The outputs are specified with 1.2 V/400 mA and 1.8 V/200 mA. The proposed decoupling model helps to analyze the multi-loop system and to design the on-chip compensators. The converter has been fabricated in 0.25-mum mixed-signal process. Simulation and measurement results confirm the proposed analysis...
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