IR3523

IR3523 DATASHEET XPHASE3TM DUAL OUTPUT CONTROL IC DESCRIPTION The IR3523 Control IC provides a full featured and flexible way to implement a complete dual output DDR & CPU VTT multiphase power solution for Intel VR11.1 motherboards. Each output interfaces with any number of xPHASE3TM Phase ICs each driving and monitoring a single phase. Output 1 includes a 3 bit VR11.x VID, 1.1V boot voltage and droop to implement the CPU VTT rail which is typically 1 phase. Output 2 includes a 3 bit VID for margining and supports any number of phases and DDR DIMM modules. The xPHASE3TM architecture results in a power supply that is smaller, less expensive, and easier to design while providing higher efficiency than conventional approaches. INDEPENDENT FEATURES FOR BOTH OUTPUT 1 & 2 Enable Input Power Good (PG) Output 0.5% overall system set point accuracy Programmable Softstart High speed error amplifier with wide bandwidth of 30MHz and fast slew rate of 12V/us Remote sense a...