The RT9210 is a dual high power, high efficiency synchronous buck DC-DC controller optimized for high performance double data rate (DDR) memory applications. It is designed to convert voltage supplies ranging from 4.5V to 5.5V into efficiently 2.5VDDQ for powering DDR memory, VTT for signal termination and a buffered amplifier for VREF reference. VTT tracks (VDDQ/2) to 30mV, and VTT accurately tracks VREF. The RT9210 integrates all of the control, output adjustment, monitoring and protection functions into a single package. The VTT supply can be turned off independently of VDDQ during S3 sleep mode, the VTT output is maintained by a low power window regulator when V2_SD pin being triggered high.