The miniaturization of semiconductor processors has led to a reduction in power supply voltage, but the current consumed has increased instead of falling, causing power consumption to continue to increase. One of the problems with the trend toward lower voltages and higher currents is the response to rapid load fluctuations, but as voltage specifications decrease, the allowable tolerances on voltage become very small. If the accuracy of the output voltage is ±3%, the tolerance of the 1V voltage must be controlled at ±30VmV. For the dedicated power supply of the server, the output voltage must be kept as stable as possible even under driving conditions with sudden changes in large current loads exceeding 1000A.

         The development trend of low-voltage and high-current applications has usually been based on high-frequency and multi-phase multi-phase VR architecture. response. For multi-phase VR, only duty cycle control of one phase is not enough to cope with large current load changes. Duty cycle control of multiple phases is required. However, switching between phases takes time, so the switching frequency needs to be further increased to speed up the response. Although increasing the frequency has a great effect on improving the load response, it will also greatly increase the switching loss. Therefore, it is difficult to achieve high performance requirements by increasing the frequency of the multi-phase VR in the existing circuit configuration.

        In addition, voltage fluctuations in high-current applications can be suppressed to a certain extent by using large-capacity external capacitors, But this also increases the mounting area and cost of the capacitor. Considering many of the above situations, TLVR (Trans-Inductor Voltage Regulators) is currently the mainstream circuit configuration to deal with rapid load fluctuations in low-voltage and high-current applications. In this circuit configuration, each phase switch is connected to an inductor with an additional winding. , the additional windings for each phase and the compensation inductor are then connected in series to provide current compensation for each phase simultaneously.

• High transient response performance to meet load requirements.
• Reduce loss.
• The output capacitance value can be kept small, thereby reducing design area and system cost.