Voltage Regulator Startup Circuit for Fast Output Stabilization
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Solution Overview
Problem
Semiconductor devices require rapid stabilization of voltage levels during initial operation to optimize performance, but existing technologies struggle to achieve this efficiently.
Innovation Solution
A voltage regulator incorporating a voltage dividing circuit, switch circuit, and control circuit to quickly stabilize output voltages through a controlled initialization period using selection codes and a switch control signal, reducing RC delay by turning on the switch circuit during initialization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a voltage regulator operates during initial startup, then voltage output is provided to the semiconductor device, but the voltage stabilization is slow due to RC delay
Solution Approach 1:
The switch circuit is activated during the initialization period to pre-establish a low-impedance path from the sourcing node to the switch node, bypassing the RC delay of the voltage dividing circuit. This preliminary action allows the output voltage to be rapidly established at the target level before normal voltage regulation begins, thereby accelerating voltage stabilization without compromising the overall regulation accuracy.
2Speed
If the switch circuit is activated during initialization, then voltage stabilization speed is improved, but device complexity increases
Solution Approach 1:
The switch circuit serves multiple functions: during the initialization period, it acts as a low-impedance path to rapidly establish output voltage; during normal operation, it can be deactivated to allow the voltage dividing circuit to perform precise voltage regulation. This multi-functionality allows a single circuit addition to provide both rapid startup and accurate regulation, minimizing the increase in overall device complexity while achieving dual objectives.
3Productivity
If voltage is rapidly stabilized during initialization, then productivity is improved, but voltage overshoot may occur
Solution Approach 1:
The control circuit monitors the output voltage during the initialization period and uses feedback control to adjust the switch circuit operation. When the output voltage approaches the target level, the control circuit deactivates the switch circuit to prevent overshoot. This feedback mechanism ensures rapid voltage stabilization while maintaining voltage accuracy and preventing harmful overshoot conditions.
Data Source
AI summary
A voltage regulator includes a voltage dividing circuit, a switch circuit and a control circuit. The voltage dividing circuit divides a voltage of a sourcing node to generate a plurality of voltages through a plurality of nodes. The switch circuit couples the sourcing node to a switch node of the plurality of nodes in response to a switch control signal. The control circuit activates the switch control signal during at least a partial period of an initialization period.