Three−Phase VRM 9.0 Buck Controller

   Multiphase controllers provide fast, accurate regulation with the control features required to power the next generation of processors in desktop, workstation and server applications. Combined with external gate drivers and power components, the NCP5306 implements a compact, highly integrated buck converter. Enhanced V2™ control inherently compensates for variations in both line and load. Current sharing between phases is achieved by Peak Current Sharing.

FEATUREs
• Switching Regulator Controller
   − Lossless Current Sensing
   − Enhanced V2 Control Method Provides Excellent Regulation
      and Fast Transient Response
   − Programmable Up to 800 kHz Switching Frequency (Per Phase)
   − Duty Cycle − 0% to 100%
   − Programmable Adaptive Voltage Positioning Reduces Output
      Capacitor Requirements
   − Programmable Soft Start
• Accurate Current Sharing
• Protection Features
   − Pulse−by−Pulse Current Limit for Each Phase
   − Programmable Hiccup Overcurrent Protection
   − All “1” DAC Code Fault
   − Processor Overvoltage Protection through Bottom MOSFETs
   − Undervoltage Lockout
• System Power Management
   − 5−Bit DAC With 1.0% Tolerance Compatible with VRM 9.0
   − Power Good Output
   − Programmable Power Good Lower Threshold
• Guaranteed Startup at −20°C