NCP81236P
Three-Rail Controller with SVID Interface for IMVP8 CPU Applications
The NCP81236P 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 VCCVCGI rails. Each of the two single−phase controllers can be used for VNN depending on the part configuration. 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 NCP81236P offers thre
- 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 (AVP)
- • Switching Frequency Range of 300 kHz – 750 kHz
- • Vin range 4.5 V to 25 V • Start-Up into Pre-Charged Loads While Avoiding False OVP
- • UltraSonic Operation
- Single-Phase Rail Features
- • Enhanced RPM Control System
- • Ultra Low Offset IOUT Monitor
- • Dynamic VID Feed-Forward
- • Programmable Droop Gain
- • Zero Droop Capable
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