Voltage Regulator Thermal Design Current Limit (VR-TDC)
VR-TDC is a power management feature supported by Intel power management architecture. The feature introduces a current limit, naturally specified in amperes, that is to be maintained to preserve the electrical constraints on properties of the voltage regulator (VR). Generally, the control algorithm monitors the Exponential Moving Average (EMA) current, which is also measured in amperes, by reading current measurements from the VR. As with other control algorithms, this algorithm controls the power budget based on a given time window. If the limit is hit, the processor will reduce the CPU frequency (frequency throttling) to ensure the current remains below this limit.
This excerpt from Intel’s website may help you:
Voltage Regulator Thermal Design Current Limit (VR-TDC)
VR-TDC is a power management feature supported by Intel power management architecture. The feature introduces a current limit, naturally specified in amperes, that is to be maintained to preserve the electrical constraints on properties of the voltage regulator (VR). Generally, the control algorithm monitors the Exponential Moving Average (EMA) current, which is also measured in amperes, by reading current measurements from the VR. As with other control algorithms, this algorithm controls the power budget based on a given time window. If the limit is hit, the processor will reduce the CPU frequency (frequency throttling) to ensure the current remains below this limit.