© Semiconductor Components Industries, LLC, 2013
August, 2013 − Rev. 1
1 Publication Order Number:
NCP81119/D
NCP81119
Multiple-Phase Controller
with SVID Interface for
Desktop and Notebook CPU
Applications
The NCP81119 Multi−Phase buck solution is optimized for
Intel® VR12.5 compatible CPUs with user configurations of 4/3/2/1
phases. 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 at reduced system cost. It has
the capability to shed to single phase during light load operation and
can auto frequency scale in light load conditions while maintaining
excellent transient performance.
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 digital current monitoring.
Features
• Meets Intel VR12.5 Specifications
• Current Mode Dual Edge Modulation for Fastest Initial Response to
Transient Loading
• High Performance Operational Error Amplifier
• Digital Soft Start Ramp
• Dynamic Reference Injection
• Accurate Total Summing Current Amplifier
• Dual High Impedance Differential Voltage and Total
Current Sense Amplifiers
• Phase−to−Phase Dynamic Current Balancing
• “Lossless” DCR Current Sensing for Current Balancing
• True Differential Current Balancing Sense Amplifiers
for Each Phase
• Adaptive Voltage Positioning (AVP)
• Switching Frequency Range of 280 kHz – 600 kHz
• 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)
• VR−RDY Output with Internal Delays
• These are Pb−Free Devices
Applications
• Desktop and Notebook Processors
MARKING
DIAGRAM
http://onsemi.com
See detailed ordering and shipping information in the package
dimensions section on page 26 of this data sheet.
ORDERING INFORMATION
QFN32
CASE 510AT
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
G = Pb−Free Package
(Note: Microdot may be in either location)
1
NCP
81119
ALYWG
G
