NCP81246: Three-Rail Multi Phase Buck Controller for IMVP8

The NCP81246 is a 3 Rail Multi Phase Buck solution is optimized for Intel IMVP8 compatible CPUs. It contains a two-phase, and two single-phase rails supporting Core, GT and SA in the following configurations 2ph-1ph-1ph, 1ph-2ph-1ph and 1ph-1ph-1ph. The part is designed for Notebook and Ultrabook applications. 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. The two single-phase controllers can be used for Core, GT or SA rails. Both make use of ON Semiconductor’s patented high performance 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 ultra low 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

Features
  • 3 Internal Drivers
  • High performance RPM control system
  • Dual Edge Modulation for multiphase rails
  • Dynamic VID Feed-Forward
  • Adaptive Voltage Positioning (AVP)
  • Switching Frequency Range of 300 kHz – 750 kHz
  • Phase to Phase dynamic current balance
Benefits
  • Allow high integration which reduces total solution PCB footprint
  • New 1 phase architecture reduces compensation components PWM output provides routing flexibility
  • Fastest Initial Response to Transient Loading
Applications
  • Embedded Systems
Data Sheets (1)
Document TitleDocument ID/SizeRevisionRevision Date
Three-Rail Controller with Intel Proprietary Interface for IMVP8 CPU ApplicationsNCP81246/D (180kB)4Dec, 2016
Package Drawings (1)
Document TitleDocument ID/SizeRevision
QFN52, 6x6, 0.4P485BE (66.0kB)B
Order Information
ProductStatusCompliancePackageMSL*ContainerBudgetary Price/Unit
NCP81246MNTXGActivePb-free Halide freeQFN-52485BE1Tape and Reel2500$0.816
Specifications
ProductTopologyPhasesControl ModeVCC Min (V)VCC Max (V)fSW Typ (kHz)tres Typ (ns)
NCP81246MNTXGStep-Down1/2Voltage Mode4.755.25300-750
Three-Rail Controller with Intel Proprietary Interface for IMVP8 CPU Applications (180kB) NCP81246
QFN52, 6x6, 0.4P NCP81246