NCP81248: Three-Rail Buck Controller for IMVP8

Description: The NCP81248 contains a two−phase, and two single−...
  • 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
  • Vin Range 4.5 V to 25 V
  • Startup into Pre−Charged Loads While Avoiding False OVP
  • Adjustable Vboot (except Rail 3)
  • 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
  • Switching Frequency Range of 200 kHz – 1.2 MHz
  • Digitally Stabilized Switching Frequency
  • Applications
  • Embedded Systems
  • Technical Documentation & Design Resources
    Availability and Samples
  • Status: Active
  • Compliance: Pb-free Halide free 
  • Description: Three-Rail Buck Controller for IMVP8
  • Package Type: QFN-48
  • Package Case Outline: 485BA
  • MSL: 1
  • Container Type: REEL
  • Container Qty: 2500
  • Specifications
  • Topology: Step-Down 
  • Phases: 1/2 
  • Control Mode: Current/Voltage Mode 
  • VCC Min (V): 4.75 
  • VCC Max (V): 5.25 
  • fSW Typ (kHz): 200 - 1200 
  • Package Type: QFN-48 
  • ON Semiconductor Full Web Site