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This paper presents a power supply module (PSM) for SoCs (system on chip). This module, which is based on an improved LDO, has a wide input range and switchable power path. The proposed PSM can output a steady voltage of 6v as input voltage varies between 5.7 V-30 V, with a max error of 4.3%. It also provides a flexible power path. The SoCs will be supplied by either internal LDO or external power...
Considering that the output voltage of battery will decline during its use, a four-switch buck-boost converter was proposed, which could provide stable output voltage over a wide voltage range of battery so as to extend the use time of battery and enhance its use efficiency. To improve the efficiency, the converter is designed to operate in multiple modes, which controlled by different strategies...
In order to increase the efficiency of portable devices powered by lithium-ion battery, a high efficiency multi-mode buck-boost controller IC is proposed in this paper. By applying a cascade buck-boost prototype, it not only realizes seamless transition between step up and down functions, but also achieves high efficiency over the entire load range by introducing BURST mode operation. System design...
The better efficiency means less heat dissipation and longer battery lifetime in wireless communication products and other portable systems powered by batteries. Therefore, the power management system with high efficiency is of great importance. As a solution, a green mode SMPS (switch mode power supply) buck regulator is proposed in this paper. Its efficiency is enhanced by so called multi-mode operation,...
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