Multi-Loop Voltage Regulator for Wide-Range Low-Power Operation
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Solution Overview
Problem
Integrated circuit voltage regulators face challenges in operating over wide input and output voltage ranges, limiting their efficiency and performance 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 manage power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a voltage regulator is designed to operate over wide input voltage ranges and output voltage ranges to enable flexibility, then adaptability is improved, but efficiency deteriorates due to performance limits and power consumption constraints
Solution Approach 1:
The voltage regulator is divided into multiple loop circuits (first loop circuit and second loop circuit) that can be selectively activated based on operating conditions. Each loop is optimized for specific voltage ranges, allowing the system to segment its operation to maintain efficiency while covering wide voltage ranges.
Solution Approach 2:
The regulator dynamically switches between different loop circuits and operating modes (normal mode, transient mode, snooze mode) based on real-time voltage conditions. This dynamic adaptation allows the system to optimize power consumption for each specific operating condition while maintaining wide voltage range capability.
2Measurement precision
If a voltage regulator operates in normal mode with closed-loop regulation to maintain precision, then voltage regulation accuracy is improved, but power consumption increases compared to open-loop operation
Solution Approach 1:
The system dynamically transitions between closed-loop mode (normal operating mode) and open-loop mode (snooze mode) based on voltage conditions. During stable operation, closed-loop provides precise regulation. During transient conditions or when precision requirements are reduced, the system switches to open-loop to minimize power consumption.
Solution Approach 2:
The regulator changes its operational parameters by switching between different feedback configurations and operating modes. This allows the system to adjust the level of regulation precision based on current needs, reducing power consumption when full precision is not required while maintaining accuracy when needed.
3Device complexity
If the amplifier operates without saturation prevention during transient modes, then device complexity is reduced, but voltage regulation reliability deteriorates due to potential saturation issues
Solution Approach 1:
The system implements preliminary action by detecting transient operating modes in advance and switching to the first feedback loop configuration before saturation can occur. This proactive switching prevents amplifier saturation during transient conditions, maintaining reliability without requiring complex saturation prevention circuitry in the normal operating path.
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.