Voltage Regulator Circuit With Tracking Pump for Low Ripple Locking
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Solution Overview
Problem
Existing regulators introduce larger ripple and stability issues due to the addition of a charge pump between the power voltage and operational amplifier, which affects the accuracy of output voltage locking.
Innovation Solution
A regulator design incorporating a pre-regulator circuit, pump circuit, and tracking circuit to generate and control the output voltage, eliminating the need for a charge pump, thereby reducing ripple and improving accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a charge pump is added between the power voltage and operational amplifier to lock the output voltage more accurately, then the output voltage locking accuracy is improved, but the ripple increases
Solution Approach 1:
The patent removes the charge pump component from the regulator circuit. By extracting this component, the harmful ripple effect is eliminated while the output voltage locking accuracy is maintained through an alternative circuit configuration that does not rely on the charge pump mechanism.
2Measurement precision
If a charge pump is added to improve output voltage locking accuracy, then the locking precision is improved, but the circuit complexity increases
Solution Approach 1:
The charge pump is extracted from the circuit, reducing the number of components and simplifying the overall circuit architecture. This extraction maintains the voltage locking function through a different approach that requires fewer additional components.
3Measurement precision
If a charge pump is added for accurate output voltage locking, then the voltage control precision is improved, but the stability of the circuit deteriorates
Solution Approach 1:
By removing the charge pump from the circuit, the source of stability issues is eliminated. The alternative circuit design provides a more stable operating condition while maintaining the required voltage locking accuracy through its inherent design characteristics.
Data Source
AI summary
A regulator includes a pre-regulator circuit, a pump circuit, an output stage circuit, and a tracking circuit. The pre-regulator circuit is configured to generate a pre-regulated voltage according to a power voltage. The pump circuit is configured to generate a pumped voltage according to the pre-regulated voltage and a tracking voltage. The output stage circuit is configured to generate an output voltage according to the pumped voltage and the power voltage. The tracking circuit is configured to track the output stage circuit to generate the tracking voltage and transmit the tracking voltage to the pump circuit.