NCP81105 Datasheet, PDF (1/36 Pages) ON Semiconductor – DrMOS Supporting 1/2/3 Phase Power Controller

NCP81105, NCP81105H
DrMOS Supporting, 1/2/3
Phase Power Controller
with SVID Interface for
Desktop and Notebook
VR12.5 & VR12.6 CPU
Applications
The NCP81105 is a DrMOS supporting controller optimized for
Intel® VR12.5 & VR12.6 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
CPU applications. The control system is based on Dual−Edge
pulse−width modulation (PWM), to provide the fastest initial response
to dynamic load events plus reduced system cost. The NCP81105 is
compatible with DrMOS type power stages such as NCP5367,
NCP5368, NCP5369 and NCP5338.
The NCP81105’s output can be configured to operate in single phase
during light load operation − improving overall system efficiency. A
high performance operational error amplifier is 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.
http://onsemi.com
MARKING
DIAGRAM
1 36
QFN36
CASE 485CC
1
NCP
81105
AWLYYWWG
A
= Assembly Location
WL = Wafer Lot
YY
= Year
WW = Work Week
G
= Pb−Free Package
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 35 of this data sheet.
Features
• Meets Intel’s VR12.5 Specifications
• Implements VR12.6 PS4 State and SVID Reporting
• Mixed Voltage/Current Mode, Dual Edge Modulation
for Fastest Initial Response to Transient Loading
• High Impedance Differential Voltage Amplifier
• High Performance Operational Error Amplifier
• High Impedance Total Current Sense Amplifier
• True Differential Current Sense Amplifiers for
Balancing Current in Each Phase
• Digital Soft Start Ramp
• Dynamic Reference Injection
• Accurate Total Summing Current Amplifier
• “Lossless” Inductor DCR Current Sensing
• Summed, Thermally Compensated Inductor Current
Sensing for Adaptive Voltage Positioning (AVP)
• 48 mV/ms Fast Output Slew Rate (NCP81105)
• 10 mV/ms Fast Output Slew Rate (NCP81105H)
• Programmable Slow Slew Rates as a Fraction of Fast
Slew Rate
• Reduced Enable to First SVID Command Latency
• Phase−to−Phase Dynamic Current Balancing
• Switching Frequency Range of 280 kHz to 1.5 MHz
• Starts up into Pre−Charged Loads while Avoiding False
OVP
• Compatible with DrMOS Power Stages
• Power−saving Phase Shedding
• Vin Feed−forward Ramp Slope Compensation
• Pin Programming for Internal SVID parameters
• Output Over Voltage Protection (OVP) & Under
Voltage Protection (UVP)
• Over Current Protection (OCP)
• Power Good Output with Internal Delays
• This is a Pb−Free Device
Applications
• Desktop and Notebook Microprocessors
© Semiconductor Components Industries, LLC, 2013
1
October, 2013 − Rev. 2
Publication Order Number:
NCP81105/D