Download CMOS High Efficiency On-chip Power Management (Analog by John Hu PDF

By John Hu

This e-book will introduce a number of strength administration built-in circuits (IC) layout options to construct destiny energy-efficient “green” electronics. The target is to accomplish excessive potency, that is necessary to meet shoppers’ transforming into desire for longer battery lives. the point of interest is to review topologies amiable for complete on-chip implementation (few exterior elements) within the mainstream CMOS expertise, in order to decrease the actual measurement and the producing price of the units.

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Additional resources for CMOS High Efficiency On-chip Power Management (Analog Circuits and Signal Processing)

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Each load circuit will have one or more power chains to the battery. Depending on the power mode, different chains can be selected and activated. Several examples of the power chains within in state-of-the-art commercial products are shown in Figs. 6 respectively. 18 μ m process (STM 2010). Circuit blocks such as General Purpose Input-Output (GPIO) and Power-on-Reset (POR) are directly powered from the battery due to voltage level compatibility and the need for direct battery voltage access. 4 G MEM 128k Flash 8k RAM Fig.

The only difference here is that A is a non-linear circuit. As a result, the conclusion so far in this section and from Sect. 1 still applies: that an optimum switching DC-DC regular should also approximate an ideal voltage source with minimal RS and input voltage dependence, and that output shunt feedback is preferred over series. 3 Topologies: LDO vs HDO Even when implementing the most common feedback mechanism, a series-shunt linear regulator, the choice of the output stage configuration makes a significant difference in performance and power efficiency.

With the help of task scheduler, power and performance can be boosted during heavy work load and critical tasks, while the opposite can be done during idle time to reduce consumption. These adjustments of power profiles can be either autonomous (Carlson and Giolma 2008), or via OS and user intervention. 2. SoC Architecture. In addition to software algorithm, certain SoC level architectural power management strategies can also be applied, such as power domain devision (Hattori et al. 2006), dynamic frequency and voltage scaling (DFVS) (Ma and Bondade 2010), adaptive voltage scaling (AVS) (Carlson and Giolma 2008), and memory retention (Narendra and Chandrakasen 2005; Wang et al.

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