© Semiconductor Components Industries, LLC, 2015
May, 2015 − Rev. 0
1 Publication Order Number:
NCP81241/D
NCP81241
Single-Phase Controller
with SVID Interface for
Desktop and Notebook CPU
Applications
The NCP81241 Single−Phase buck solution is optimized for Intel
®
VR12.1 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 single phase controller uses DCR current sensing
providing the fastest initial response to dynamic load events at reduced
system cost.
The NCP81241 incorporates an internal MOSFET driver for
improved system efficiency. 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 VR12.1 Specifications
• High Performance Operational Error Amplifier
• Digital Soft Start Ramp
• Dynamic Reference Injection
• “Lossless” DCR Current Sensing
• Adaptive Voltage Positioning (AVP)
• Switching Frequency Range of 250 kHz – 1.2 MHz
• VIN Range 4.5 V − 25 V
• Startup into Pre−Charged Load While Avoiding False OVP
• Vin Feed Forward Ramp Slope
• Pin Programming for Internal SVID parameters
• Over Voltage Protection (OVP) and Under Voltage Protection (UVP)
• Over Current Protection (OCP)
• VR−RDY Output with Internal Delays
• These Devices are Pb−Free and are RoHS Compliant
Applications
• Desktop and Notebook Processors
MARKING
DIAGRAM
www.
onsemi.com
See detailed ordering and shipping information in the package
dimensions section on page 26 of this data sheet.
ORDERING INFORMATION
QFN28
CASE 485AR
1
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
G = Pb−Free Package
NCP
81241
ALYWG
G
(Note: Microdot may be in either location)
