Dual-Mode LDO Circuit for Selective Voltage and Current Regulation
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Solution Overview
Problem
Existing power supply circuits, particularly those with dedicated flash drivers, are inflexible, leading to wasted resources, increased complexity, and scalability challenges due to their inability to adapt to different functional requirements in various devices.
Innovation Solution
A dual-mode LDO-based power supply circuit that can be selectively configured as a current regulator or a voltage regulator, eliminating the need for a dedicated flash driver, thereby enhancing flexibility and scalability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dedicated flash driver is used in power supply circuits, then the circuit can provide specialized functionality for flash operations, but the device complexity increases and scalability is reduced
Solution Approach 1:
The LDO regulator is designed to perform multiple functions by switching between voltage regulation mode and current regulation mode. The same basic circuit topology can serve as a dedicated flash driver when configured for current regulation, eliminating the need for separate dedicated flash driver circuits while maintaining the specialized functionality required for flash operations
2Reliability
If dedicated components are included for specific functions, then the circuit can reliably perform those functions, but resource waste and costs increase
Solution Approach 1:
The power supply circuit uses a single LDO regulator that can be dynamically reconfigured between voltage regulation and current regulation modes. This eliminates the need for separate dedicated flash driver components, reducing resource waste while maintaining reliable flash functionality when needed
Solution Approach 2:
The circuit incorporates dynamic reconfiguration capability through switching mechanisms that allow the LDO regulator to transition between different operational modes (voltage regulation and current regulation) based on the specific application requirements, enabling the same hardware to serve multiple purposes
3Productivity
If the power supply circuit is designed for a specific function, then it performs that function efficiently, but adaptability to different device functionalities is reduced
Solution Approach 1:
The LDO regulator is designed with dynamic reconfiguration capability that allows it to switch between voltage regulation mode and current regulation mode based on the connected load requirements. This enables the same circuit to efficiently serve different functions (general voltage regulation or dedicated flash driver) without sacrificing functional efficiency in either mode
Solution Approach 2:
The power supply circuit is designed as a universal platform that can adapt to different device functionalities by changing its operational mode. The same basic circuit architecture provides both voltage regulation for general purposes and current regulation for flash operations, enhancing adaptability while maintaining efficiency
Data Source
AI summary
Techniques and apparatus for supplying power via selective voltage or current regulation are provided. An example power supply circuit generally includes a first transistor, a first amplifier including an output coupled to a gate of the first transistor and a first input coupled to a reference node, a current sensing circuit including an input coupled to the gate of the first transistor, and a first multiplexer. The first multiplexer includes a first input coupled to a drain of the first transistor, a second input coupled to an output of the current sensing circuit, and an output coupled to a second input of the first amplifier. Another example power supply circuit generally includes a low-dropout (LDO) regulator circuit, the power supply circuit being selectively configurable as a current regulator or as a voltage regulator with respect to a load for the LDO regulator circuit.