Adaptive Internal Voltage Circuit for Standby Leakage Suppression
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Solution Overview
Problem
Conventional semiconductor devices face challenges in suppressing leakage current during standby mode without using deep power-down (DPD) mode, which results in increased power consumption and delayed recovery from standby state due to floating peripheral circuits and time-consuming capacitor charging.
Innovation Solution
A voltage generating circuit comprising a reference voltage generating part, leakage current monitoring part, and control part that autonomously controls the reference voltage to minimize leakage current in semiconductor devices, eliminating the need for DPD mode by adjusting the internal supply voltage based on monitored leakage current, thereby maintaining low power consumption and enabling prompt operation resumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If DPD mode is used to suppress leakage current, then power consumption is reduced, but recovery time increases due to floating peripheral circuits and capacitor charging
Solution Approach 1:
The patent applies dynamics by making the internal supply voltage adjustable rather than fixed. The voltage generating circuit dynamically adjusts the internal supply voltage to a lower level during standby mode, which suppresses leakage current without completely cutting off power supply. This dynamic voltage adjustment allows peripheral circuits to remain connected and capacitors to maintain charge, enabling fast recovery while reducing power consumption.
Solution Approach 2:
The patent changes the voltage parameter of the internal supply from a fixed high level to a dynamically adjustable level. By lowering the internal supply voltage during standby mode, the patent suppresses leakage current in peripheral circuits without entering DPD mode. This parameter change allows the system to maintain circuit connections and reduce recovery time while achieving power savings.
2Productivity
If internal supply voltage is increased, then operational performance is improved, but leakage current increases
Solution Approach 1:
The patent makes the internal supply voltage dynamic rather than static. The voltage generating circuit adjusts the internal supply voltage based on operational mode: higher voltage during active mode for optimal performance, and lower voltage during standby mode to suppress leakage current. This dynamic adjustment resolves the contradiction between performance and power consumption.
Solution Approach 2:
The patent changes the voltage parameter of the internal supply based on operational requirements. During standby mode, the internal supply voltage is lowered to suppress leakage current. During active mode, the voltage is restored to higher levels for optimal performance. This conditional parameter change allows the system to optimize both power consumption and performance as needed.
Data Source
AI summary
Disclosed is a voltage generating circuit including a reference voltage generating part, a leakage current monitoring part, a control part, and an internal voltage generating part. The reference voltage generating part generates a reference voltage. The leakage current monitoring part generates a monitoring leakage current corresponding to a leakage current of an internal circuit of a semiconductor device. The control part controls the reference voltage according to the monitoring leakage current. The internal voltage generating part receives the reference voltage being controlled by the control part, and supplies an internal voltage to the internal circuit according to the controlled reference voltage. A semiconductor device including the same is also disclosed.