NCP81246

NCP81246 Three-Rail Controller with Intel Proprietary Interface for IMVP8 CPU Applications The NCP81246 contains a two-phase, and two single-phase buck regulators 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 Rail2. The two single-phase controllers can be used for Rail1, Rail3 and Rail4 rails. Both make use of ON Semiconductor’s patented enhanced RPM operation. RPM control maximizes transient response while allowing for smooth transitions between discontinuous frequency scaling operation and continuous mode full power operation. The single-phase rails have an ultralow offset current monitor amplifier with programmable offset compensation for ultra high accuracy current monitoring. The NCP81246 offers three internal MOSFET drivers with a single external PWM signal. Two-Phase Rail Features Dual Edge Modulation for Fastest Initial Response to Transient Loading High Performance Operational Error Amplifier Digital Soft Start Ramp Dynamic Reference Injection® (Patent #US7057381) Accurate Total Summing Current Amplifier(Patent #US6683441) Dual High Impedance Differential Voltage and Total Current Sense Amplifiers Phase-to-Phase Dynamic Current Balancing True Differential Current Balancing Sense Amplifiers for Each Phase Adaptive Voltage Positioning (...