NCP81248MNTXG

The NCP81248 contains a two−phase, and two single−phase buck regulator controllers optimized for Intel IMVP8 compatible CPUs. The two−phase controller combines true differential voltage sensing, differential inductor DCR current sensing, input voltage feed−forward, and adaptive voltage positioning to provide accurately regulated power for IMVP8 CPU. The two single−phase controllers make use of ON Semiconductor’s patented high performance RPM operation. RPM control maximizes transient response while allowing smooth transitions between discontinuous frequency scaling operation and continuous mode full power operation. The single−phase rails have a low offset current monitor amplifier with programmable offset compensation for high accuracy current monitoring. Features Common to All Rails • Vin Range 4.5 V to 25 V • Startup into Pre−Charged Loads While Avoiding False OVP • Digital Soft Start Ramp • Adjustable Vboot (except Rail3) • High Impedance Differential Output Voltage Amplifiers • Dynamic Reference Injection • Programmable Output Voltage Slew Rates • Dynamic VID Feed−Forward • Differential Current Sense Amplifiers for Each Phase • Programmable Adaptive Voltage Positioning (AVP) • Switching Frequency Range of 200 kHz –1.2 MHz • Digitally Stabilized Switching Frequency • UltraSonic Operation Two−phase Rail Features • Supports Intel proprietary interface Addresses 00 and 01 • Current Mode Dual Edge Modulation for Fastest Initial Response to Transient Loading • High Performance Operational Error Amplifier • Accurate Total Summing Current Amplifier • Phase−to−Phase Dynamic Current Balancing • Power Saving Phase Shedding