Power source management architecture and boost converter applied to power source management architecture

Abstract

The invention discloses a power source management architecture and a boost converter applied to the power source management architecture. The power source management architecture comprises a boost converter; the input end of the boost converter is connected with a pin VIN and a digital circuit, wherein the pin VIN is used for providing a low-voltage power source for the digital circuit, and the digital circuit is located in an SoC (system-in-chip); the output end of the boost converter is connected with the power source of a low-dropout output linear voltage regulator (LDO); and the output ofthe low-dropout output linear voltage regulator (LDO) provides a high-voltage power source for analog and radio frequency circuits. The boost converter has the advantages of high efficiency, low ripple and wide input and output range. With the power source management architecture adopted, overall power supply efficiency is improved. The power source management architecture is suitable for SoC power supply solutions under advanced processes.

Description

technical field [0001] The invention belongs to the technical field of design of semiconductor integrated circuits and power electronic systems, and in particular relates to a power management architecture and a boost converter applied to the power management architecture. Background technique [0002] The power management module is widely used in electronic equipment to realize the modulation of the power supply, so as to meet the demand of the load for the power supply. For a system on chip (System on Chip, SoC), the power management module converts the off-chip voltage to a lower voltage through a step-down converter for use by digital circuits, analog circuits and radio frequency circuits in the SoC. The current ratio of the digital circuit and the analog circuit integrated in the SoC can reach 10:1 or even higher. At the same time, since digital circuits can well match the process of scaling down, more and more analog and RF modules in SoC are implemented by digital ci...

AI Technical Summary

Problems solved by technology

Traditional power management uses a step-down DC-DC converter to step down the input voltage and then supply power to the digital circuit through the LDO. As the scale of the digital circuit in the SoC increases, more and more energy is consumed in the link where the LDO supplies power to the digital circuit. The power supply efficiency of the entire power management module is reduced

As the operating voltage of digital circuits continues to decrease and the current continues to increase, the overall efficiency of traditional solutions will further deteriorate

[0003] The power management module in the SoC has the problem that the power supply efficiency of the step-down link is low due to the power supply requirements of the digital circuit, and the proportion of the digital circuit in the future SoC will further increase, which will make the efficiency continue to deteriorate.

The traditional Boost structure has a right-half-plane zero point, which requires complex loop compensation in the design. At the same time, the large output ripple makes designers reluctant to choose the Boost structure to avoid performance degradation of noise-sensitive circuits in SoCs.

Switched capacitors can only produce a fixed output voltage due to their structure, which is not suitable for SoC applications

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