Dual-Loop Voltage Regulator for Stable Multi-Mode Operation
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Solution Overview
Problem
Integrated circuits face challenges in operating over wide input and output voltage ranges, limiting the efficiency and performance of internal voltage regulators due to the need for flexibility in voltage regulation.
Innovation Solution
The apparatus includes multiple loop circuits and voltage regulators that dynamically switch between modes to provide regulated voltages, with a selection circuit and controller managing feedback signals to optimize voltage regulation across varying supply voltages, using MOSFETs and transconductors to prevent saturation and maintain efficient operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single voltage regulator is designed to operate over wide input voltage ranges, then flexibility and adaptability are improved, but efficiency deteriorates due to increased power consumption and performance limitations
Solution Approach 1:
The voltage regulator is divided into two separate regulators: a first voltage regulator optimized for high power mode with wide input voltage range, and a second voltage regulator optimized for low power mode with narrow input voltage range. Each regulator is segmented to handle specific operating conditions, improving overall efficiency while maintaining adaptability across wide voltage ranges.
Solution Approach 2:
The system dynamically switches between the first and second voltage regulators based on operating conditions (power mode and input voltage level). A detection circuit monitors the input voltage and controls the switching between regulators, allowing the system to adapt its configuration in real-time to maintain optimal efficiency across different operating scenarios.
2Use of energy by moving object
If the voltage regulator operates in low power mode, then power consumption is reduced, but the ability to regulate voltage when supply voltage is below regulated voltage is lost
Solution Approach 1:
The system dynamically selects the appropriate voltage regulator based on the input voltage level and power mode. When in low power mode and input voltage is sufficient, the second low power regulator is used. When input voltage drops below the regulated voltage, the system dynamically switches to the first high power regulator that can operate in pass-through mode to maintain voltage regulation capability.
Solution Approach 2:
The detection circuit and control logic act as intermediaries that monitor operating conditions and coordinate the switching between the two voltage regulators. This intermediary mechanism ensures seamless transition between regulators, maintaining voltage regulation capability while optimizing power consumption based on real-time conditions.
3Use of energy by moving object
If multiple voltage regulators are used to cover different operating modes, then efficiency and adaptability are improved, but device complexity increases
Solution Approach 1:
The two voltage regulators share common components including the detection circuit, control logic, and output stage. The first and second regulators are merged into a unified system with shared resources, reducing the overall complexity compared to completely separate regulator systems while maintaining the benefits of dual-regulator operation.
Solution Approach 2:
The first voltage regulator is designed with multi-functionality to handle both normal power mode and pass-through mode for low power operation. The second voltage regulator handles low power mode with sufficient input voltage. This universal design approach allows each regulator to perform multiple functions, reducing the need for additional specialized components and simplifying the overall system.
Data Source
AI summary
In an embodiment, an apparatus includes: an amplifier to compare a reference voltage to a feedback voltage and to output a comparison signal based on the comparison; a first loop circuit coupled to the amplifier to receive the comparison signal and output a first feedback voltage for the amplifier to use as the feedback voltage in a first mode of operation; and a second loop circuit coupled to the amplifier. The second loop circuit may be configured to receive the comparison signal and output a second feedback voltage for the amplifier to use as the feedback voltage in a second mode of operation. The second feedback voltage may be greater than the first feedback voltage, and the second loop circuit may output a regulated voltage based on the comparison signal.