NCP6121 Datasheet, PDF (1/28 Pages) ON Semiconductor – Dual Output 3 Phase +1/0 Phase Controller

NCP6121
Dual Output 3 Phase +1/0
Phase Controller with
Single SVID Interface for
Desktop and Notebook CPU
Applications
http://onsemi.com
The NCP6121 dual output three 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 Desktop 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.
MARKING
DIAGRAM
1 52
QFN−52
CASE 485BE
NCP6121
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 27 of this data sheet.
Features
• Meets Intel VR12 and 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
• Accurate Total Summing Current Amplifier
• DAC with Droop Feed−forward Injection
• 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 200 kHz – 1.0 MHz
• 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) and Under Voltage
Protection (UVP)
• Over Current Protection (OCP)
• Dual Power Good Output with Internal Delays
• These Devices are Pb−Free and are RoHS Compliant
Applications
• Desktop and Notebook Processors
© Semiconductor Components Industries, LLC, 2013
1
January, 2013 − Rev. 2
Publication Order Number:
NCP6121/D