The ISL95869 is fully compliant with Intel IMVP9 specifications and provides a complete solution for the processor's main input rail power supply. It provides a Voltage Regulator (VR) with two integrated and one external gate drivers. The VR can be configured as 3-, 2-, or 1-phase, providing maximum flexibility. The VR uses the serial control bus (SVID) to communicate with the CPU and achieves lower cost and smaller board area. Based on the Renesas Robust Ripple Regulator (R3™) technology, the R3 modulator has many advantages compared to traditional modulators. These advantages include faster transient settling time, variable switching frequency in response to load transients, and improved light load efficiency due to Diode Emulation mode with load-dependent low-switching frequency. The ISL95869 has several other key features. The output supports DCR current sensing with single NTC thermistor for DCR temperature compensation or accurate resistor current sensing. The output comes with remote voltage sense, programmable VBOOTvoltage, programmable ICCMAX, programmable voltage transition slew rate, adjustable switching frequency, overcurrent protection, and VR_READY power-good output. The ISL95869 supports the system input power (PSYS) monitoring with alternate VSYS mode. The controller complies with PS4 power requirements and supports ISL95808 drivers that are compatible.