Memory Module PMIC Surge Response Using Tailored Voltage Step-Up
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Solution Overview
Problem
Existing memory systems face challenges in managing power supply voltage effectively during sudden current surges, leading to potential data corruption and increased power consumption due to unnecessary voltage increments.
Innovation Solution
The proposed solution involves physically testing DIMMs for their worst-case current draw and resulting voltage droop during initial installation, allowing for the determination of a specifically tailored step-up voltage to be applied during subsequent current surges, thereby maintaining the supply voltage above the minimum allowable value without unnecessary overvoltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed increment voltage step-up is applied in response to current surge, then the supply voltage is maintained above minimum allowable value, but unnecessary power consumption occurs due to overvoltage
Solution Approach 1:
The system performs preliminary testing during initial installation to measure the DIMM's worst-case current draw and resulting voltage droop. Based on these pre-measured characteristics, a customized voltage step-up value is calculated and programmed into the voltage regulator before normal operation begins. This preliminary characterization allows the system to respond efficiently to current surges without applying excessive voltage increments.
Solution Approach 2:
The invention changes the voltage step-up parameter from a fixed predetermined value to a dynamically customized value based on the specific DIMM's electrical characteristics. By measuring the actual voltage droop during worst-case current draw and calculating an optimized step-up value, the system adapts the voltage regulation parameter to match the specific memory module's requirements, avoiding both insufficient voltage recovery and excessive overvoltage.
2Device complexity
If a predetermined fixed voltage step-up is used, then the system is simple to implement, but it cannot adapt to different DIMM types and suppliers with varying current draw characteristics
Solution Approach 1:
During initial installation, the system performs preliminary electrical testing to measure each DIMM's specific current draw characteristics and voltage droop behavior. These measurements are stored in non-volatile memory or registered in the memory controller, creating a customized profile for each memory module before normal operation begins.
Solution Approach 2:
The voltage step-up parameter is changed from a fixed universal value to a customized value specific to each DIMM's electrical characteristics. The system measures the actual voltage droop during worst-case current draw and programs a tailored step-up value into the voltage regulator, enabling precise adaptation to different DIMM types, capacities, and suppliers while maintaining system reliability.
Data Source
AI summary
An apparatus is described. The apparatus includes a power management integrated circuit (PMIC) to generate a supply voltage for a memory module. The PMIC is to perform a measurement during bring-up of the memory module of a worst case current draw of the memory module and/or corresponding droop in the supply voltage. The PMIC is to apply a step-up to the supply voltage in accordance with the measurement in response to detection by the PMIC of a surge in the memory module's current draw during operation of the memory module.