Integrated Regulator Circuit for Output Voltage Oscillation Suppression
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Solution Overview
Problem
Power management ICs face issues with oscillations in output voltage due to increasing power consumption, necessitating circuitry to stabilize the voltage supply to electronic components.
Innovation Solution
A regulator design incorporating an amplifier, buffer, current sensor, loop circuit, and stabilizing circuit to control overshoot and undershoot by generating a loop current based on power gate and output voltages, adjusting a zero point to suppress oscillations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If power consumption of electronic components increases, then power delivery capability is improved, but oscillation occurs in output voltage
Solution Approach 1:
The patent implements a feedback mechanism where the output voltage is monitored and fed back to the control circuit. The control circuit adjusts the power transistor gate voltage based on the feedback signal to maintain stable output voltage even when power consumption increases, preventing oscillation while delivering required power.
Solution Approach 2:
The patent introduces a compensation capacitor as an intermediary element in the control circuit. This capacitor compensates for the effects of increased power consumption by adjusting the timing and magnitude of control signals, thereby preventing output voltage oscillation while maintaining power delivery capability.
2Stability of the object's composition
If circuitry is added to suppress variations in output voltage, then output voltage stability is improved, but device complexity increases
Solution Approach 1:
The patent combines the voltage regulation function and oscillation suppression function into a single integrated control circuit. By merging these functions, the patent achieves stable output voltage without requiring separate complex circuitry for each function, thereby minimizing overall device complexity.
Solution Approach 2:
The control circuit is designed to perform multiple functions: regulating output voltage, suppressing oscillations, and adapting to varying power consumption levels. This multi-functional design eliminates the need for separate dedicated circuits for each function, reducing overall device complexity while maintaining voltage stability.
Data Source
AI summary
A regulator may amplify a difference between an input voltage and a feedback voltage to obtain and apply an amplified voltage to a first node, and buffer the amplified voltage to obtain and apply a power gate voltage to a second node. The regulator may include a first power transistor connected to the second node, a first electrode connected to a power supply voltage, and a second electrode connected to an output node, a voltage dividing circuit configured to generate the feedback voltage based on an output voltage of the output node, a current sensor configured to generate an sensing current based on a current of the first power transistor, a loop circuit configured to generate a loop current based on the power gate voltage and the output voltage, and a stabilizing circuit configured to suppress oscillation of the output voltage.