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© Semiconductor Components Industries, LLC, 2017
January, 2017 − Rev. 6
1 Publication Order Number:
NCP81245/D
NCP81245
Three-Rail Output
Controller with Single Intel
Proprietary Interface for
Desktop and Notebook CPU
Applications
The NCP81245 (3+3+1 phase) three−output buck solution is
optimized for Intel’s IMVP8 CPUs.
The two multi−phase rail control systems are based on Dual−Edge
pulse−width modulation (PWM) combined with DCR current sensing
providing an ultra fast initial response to dynamic load events and
reduced system cost.
The single−phase rail makes 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 NCP81245 has an ultra−low offset current
monitor amplifier with programmable offset compensation for
high−accuracy current monitoring.
Three−Phase Rails Feature
• 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
• True Differential Current Balancing Sense Amplifiers for Each Phase
• Adaptive Voltage Positioning (AVP)
• Switching Frequency Range of 300 kHz − 750 kHz
• Vin range 4.5 V to 20 V
• Startup into Pre−Charged Loads While Avoiding False OVP
• UltraSonic Operation
• These Devices are Pb−Free and are RoHS Compliant
Single−Phase Rail Features
• Enhanced RPM Control System
• Ultra Low Offset IOUT Monitor
• Dynamic VID Feed−Forward
• Programmable Droop Gain
• Zero Droop Capable
• Thermal Monitor
• UltraSonic Operation
• Adjustable Vboot
• Digitally Controlled Operating Frequency
Applications
• Desktop & Notebook Processors
• Gaming
MARKING
DIAGRAM
www.
onsemi.com
521
QFN52
MN SUFFIX
CASE 485BE
F = Wafer Fab
A = Assembly Site
WL = Lot ID
YY = Year
WW = Work Week
G = Pb−Free Package
NCP81245
FAWLYYWW
G
Device Package Shipping
†
ORDERING INFORMATION
NCP81245MNTXG QFN52
(Pb−Free)
2500 / Tape
& Reel
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specification
Brochure, BRD8011/D.
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