Power Control Device for Semiconductor Memory Boot-Up Stability
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Solution Overview
Problem
Semiconductor memory devices face instability in internal driving signals during boot-up operations due to unstable internal voltages, which can lead to incorrect reading and storage of repair information, especially as memory capacity increases and defect density rises, affecting device performance and yield.
Innovation Solution
A power control device and method that generates a driving signal from a power supply voltage, using a power supply unit and a power driving unit to stabilize the internal voltage by activating and deactivating control signals, ensuring the driving signal is maintained at a stable level during boot-up, and employing an LDO regulator to manage voltage levels effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the memory capacity is increased to improve storage capability, then the defect density increases causing internal voltage instability during boot-up, but increasing power supply stability measures increases device complexity
Solution Approach 1:
The patent applies preliminary action by generating the driving signal at full power supply voltage level before the boot-up operation begins. The power supply unit and power driving unit are activated in advance to establish a stable driving signal, ensuring that when the electrical fuse unit performs boot-up operations, the internal voltages are already stabilized despite increased defect density from higher memory capacity.
2Reliability
If the driving signal level is maintained at power supply voltage level during boot-up, then internal voltage stability is improved, but power consumption increases
Solution Approach 1:
The patent implements periodic action by controlling the power supply unit and power driving unit to operate at full power supply voltage level only during the critical boot-up period. The control signal activates these units when the power-up signal indicates boot-up is needed, and deactivates them after boot-up completes, reducing power consumption while maintaining voltage stability when most critical.
Solution Approach 2:
The system dynamically adjusts the operating state of the power supply unit and power driving unit based on the boot-up phase. During boot-up, these units operate at full power to stabilize internal voltages; after boot-up, they are deactivated to reduce power consumption. This dynamic control optimizes both voltage stability and energy efficiency.
Data Source
AI summary
An embodiment relates to a power control device and a technology capable of stably supplying power when an electrical fuse boots up. The power control device includes a power supply unit, a power driving unit, and an electrical fuse unit. The power supply unit generates a driving signal from a power supply voltage when a control signal is activated. The power driving unit outputs the driving signal when the control signal is activated. The electrical fuse unit generates, when a boot-up enable signal is activated, a clock signal by performing a boot-up operation in response to the driving signal outputted from the power driving unit.