A power management architecture and a boost converter applied to the power management architecture

Abstract

The invention discloses a power management architecture and a boost converter applied to the power management architecture, including a boost converter, the input terminals of the boost converter are respectively connected to the pins V that provide low-voltage power for digital circuits IN And the digital circuit connection in the SoC system-on-a-chip; the output of the boost converter is connected to the power supply of the low-dropout linear regulator LDO, and the output of the low-dropout linear regulator LDO provides high-voltage power for analog and radio frequency circuits. The boost converter of the invention has high efficiency, low ripple, wide input and output range, and the power management structure improves the overall power supply efficiency, and is suitable for SoC power supply solutions under advanced technology.

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 c...

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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