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A novel double-bound hysteretic regulation scheme to control multi-phase interleaved Switched-Capacitor DC-DC converters is presented. The control scheme adjusts the number of interleaved phases with the SC converter's switching frequency to significantly reduce the required operating frequency of the control comparator, enabling the practical application of hysteretic control with large number of...
In this paper we propose a controlled cross-coupled switched-capacitor based embedded DC-DC buck converter based on non-overlapping rotational time interleaving switching scheme and frequency control regulation. Proposed converter uses low swing internal signals to control half of the switches. In addition to reduction of switching power loss, the low swing control signals help to use smaller switches...
In low-power applications, some design considerations are different from traditional circuits. A procedure of analyzing and designing a modified QSC-based step-down converter for low power applications is presented. An integrated 5V/3.3V step-down SC-based DC-DC converter was implemented using the 0.35μm mixed-signal 2P4M polycide 3.3/5V process, and the measured results show that it has excellent...
This paper proposes a fully integrated asynchronous step-down switched capacitor DC-DC conversion structure. The circuit uses a fully digital asynchronous state machine as the heart of the control circuitry. To minimize the switching losses, the asynchronous controller scales the switching frequency of the converter according to the load. It also turns on additional parallel switches when needed....
This paper deals with the efficiency improvement of an embedded hybrid DC-DC converter which is suitable for high dropout embedded regulation. In the proposed topology, power efficiency is improved by eliminating shoot-through current of switched-Capacitor module using Non-overlapped Rotational Time Interleaving (NRTI) switching scheme. In addition to the improvement in power efficiency, this scheme...
A power interface IC is designed and demonstrated to convert and manage power for a wireless tire pressure sensor node. The IC includes two switched-capacitor DC-DC converters to supply power to the various components of the sensor at their appropriate voltages. The design of the two integrated converters is discussed, including the optimization of capacitors and power transistors. The losses due...
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