The NCP6151/NCP6151A dual output four plus one
phase buck solution is optimized for Intel VR12
compatible CPUs. The 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 both Desktop and Notebook
applications. The control system is based on Dual-Edge
pulse-width modulation (PWM) combined with DCR
current sensing providing the fastest initial response to
dynamic load events and reduced system cost. It also
sheds to single phase during light load operation and
can auto frequency scale in light load while maintaining
excellent transient performance.
Dual high performance operational error amplifiers are
provided to simplify compensation of the system.
Patented Dynamic Reference Injection further simplifies
loop compensation by eliminating the need to
compromise between closed-loop transient response
and Dynamic VID performance. Patented Total Current
Summing provides highly accurate current monitoring for
droop and digital current monitoring.
NCP6151A support coupled inductor operation. It
operates with 2 phases versus NCP6151 operating with
single phase during PS1 mode.

Features
• Meets Intel VR12/IMVP7 Specifications
• Current Mode Dual Edge Modulation for Fastest
Initial Response to Transient Loading
• Dual High Performance Operational Error Amplifier
• One Digital Soft Start Ramp for Both Rails
• Dynamic Reference Injection® (Patent
#US07057381)
• Accurate Total Summing Current Amplifier(Patent
#US006683441)
• DAC with Droop Feed-forward Injection(Patent
Pending)
• Dual High Impedance Differential Voltage and Total
Current Sense Amplifiers
• Phase-to-Phase Dynamic Current Balancing
• “Lossless” DCR Current Sensing for Current
Balancing
• Summed Thermally Compensated Inductor Current
Sensing for Droop
• True Differential Current Balancing Sense Amplifiers
for Each Phase
• Adaptive Voltage Positioning (AVP)
• Switching Frequency Range of 200KHz –
1.0MHz
• Startup into Pre-Charged Loads While
Avoiding False OVP
• Power Saving Phase Shedding
• Vin Feed Forward Ramp Slope
• Pin Programming for Internal SVID
parameters
• Over Voltage Protection (OVP) & Under
Voltage Protection (UVP)
• Over Current Protection (OCP)
• Dual Power Good Output with Internal Delays
• NCP6151A support coupled inductor operation

Applications
• Desktop & Notebook Processors