NCP81246 Datasheet (ON Semiconductor)

NCP81246, Three-Rail Controller

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

NCP81246 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)