Voltage Regulator Load Line Compensation Using Multiple Voltage Settings
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Solution Overview
Problem
Load line compensated voltage regulators consume more power than necessary in lightly loaded systems due to higher supply voltage, which is undesirable in battery-operated systems or those concerned with power savings.
Innovation Solution
A power management unit provides multiple voltage identifiers to adjust the load line voltage output based on processor core operating states, reducing voltage when load current is low to minimize power consumption and prevent voltage droops, and inhibits state changes that could increase load current until the voltage is adjusted.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If load line compensation is used to reduce voltage droop exposure, then voltage stability is improved, but power consumption increases due to higher supply voltage in lightly loaded conditions
Solution Approach 1:
The patent applies dynamics by making the voltage regulator adaptable to different operating conditions. The system dynamically switches between load line compensation mode (for voltage stability during transitions) and direct voltage control mode (for power efficiency during steady-state light loads), allowing the control mechanism to be optimized for the current operational context rather than using a fixed approach
Solution Approach 2:
The patent changes the control parameter based on operating state. When the processor is in a steady-state light load condition, the system changes from using load line compensation (which maintains higher voltage) to direct voltage control (which allows lower voltage), thereby reducing power consumption while maintaining voltage stability through multiple VID settings
2Use of energy by moving object
If multiple voltage settings are used for different operating states, then power consumption is reduced, but device complexity increases
Solution Approach 1:
The patent segments the control mechanism into distinct modes: load line compensation mode for handling transitions and direct voltage control mode for steady-state operation. Each mode has its own control path and parameter set, allowing the system to achieve power efficiency through multiple voltage settings without requiring a completely complex unified control mechanism
Solution Approach 2:
The patent makes the voltage regulator multi-functional by enabling it to operate in different control modes depending on the operating state. The same hardware infrastructure supports both load line compensation and direct voltage control, as well as multiple VID settings, reducing the need for additional dedicated components while achieving power savings
Data Source
AI summary
A system includes one or more processor cores, and a voltage regulator that provides an operating voltage to the one or more processor cores in response to receiving a voltage identifier signal that is indicative of the operating voltage. The system also includes a power management unit that may provide a first voltage identifier signal corresponding to a first operating voltage in response to determining that the processor cores are operating in a first operating state in which the one or more processor cores may draw up to a maximum load current. The power management unit may also provide a second voltage identifier signal corresponding to a second operating voltage, which is less than the first operating voltage, in response to determining that the processor cores are operating in a second operating state in which the processor cores are incapable of an increase in load current above a predetermined amount.