NCP81248 Datasheet, PDF (1/27 Pages) ON Semiconductor – Three-Rail Controller

NCP81248
Three-Rail Controller with
Intel Proprietary Interface
for IMVP8 CPU Applications
The NCP81248 contains a two−phase, and two single−phase buck
regulator controllers optimized for Intel IMVP8 compatible CPUs.
www.onsemi.com
The two−phase 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 IMVP8 CPU.
MARKING
DIAGRAM
The two single−phase controllers make use of ON Semiconductor’s
patented high performance RPM operation. RPM control maximizes
transient response while allowing smooth transitions between
discontinuous frequency scaling operation and continuous mode full
power operation. The single−phase rails have a low offset current
1 48
QFN48
CASE 485BA
NCP81248
FAWLYYWW
G
monitor amplifier with programmable offset compensation for high
accuracy current monitoring.
NCP81243 = Specific Device Code
F = Wafer Fab Code
Features Common to All Rails
• Vin Range 4.5 V to 25 V
A = Assembly Location
WL = Wafer Lot
YY = Year
• Startup into Pre−Charged Loads While Avoiding False OVP
• Digital Soft Start Ramp
WW = Work Week
G = Pb−Free Package
• Adjustable Vboot (except Rail3)
• High Impedance Differential Output Voltage Amplifiers
ORDERING INFORMATION
• Dynamic Reference Injection
Device
Package
Shipping
• Programmable Output Voltage Slew Rates
• Dynamic VID Feed−Forward
• Differential Current Sense Amplifiers for Each Phase
• Programmable Adaptive Voltage Positioning (AVP)
• Switching Frequency Range of 200 kHz –1.2 MHz
NCP81248MNTXG QFN48 2500 / Tape &
(Pb−Free)
Reel
†For information on tape and reel specifications, in-
cluding part orientation and tape sizes, please refer
to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
• Digitally Stabilized Switching Frequency
• UltraSonic Operation
Single−phase Rail Features
• Supports Intel proprietary interface Addresses 00, 01,
02 and 03
Two−phase Rail Features
• Supports Intel proprietary interface Addresses 00 and
01
• Current Mode Dual Edge Modulation for Fastest Initial
• High Performance RPM Control System
• Low Offset IOUT Monitor
• Zero Droop Capable
Response to Transient Loading
• High Performance Operational Error Amplifier
Other Features
• PSYS Input Monitor
• Accurate Total Summing Current Amplifier
• Thermal Monitors for Three Intel proprietary interface
• Phase−to−Phase Dynamic Current Balancing
• Power Saving Phase Shedding
Addresses
• These Devices are Pb−Free, Halogen Free/BFR Free
and are RoHS Compliant
© Semiconductor Components Industries, LLC, 2016
1
July, 2016 − Rev. 1
Publication Order Number:
NCP81248/D