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NCP81246

ON Semiconductor
Part Number NCP81246
Manufacturer ON Semiconductor
Description Three-Rail Controller
Published Feb 2, 2016
Detailed Description NCP81246 Three-Rail Controller with Intel Proprietary Interface for IMVP8 CPU Applications The NCP81246 contains a two-...
Datasheet PDF File NCP81246 PDF File

NCP81246
NCP81246

Overview
NCP81246 Three-Rail Controller with Intel Proprietary Interface for IMVP8 CPU Applications The NCP81246 contains a two-phase, and two single-phase buck regulators optimized for Intel IMVP8 compatible CPUs.
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 Rail2.
The two single-phase controllers can be used for Rail1, Rail3 and Rail4 rails.
Both make use of ON Semiconductor’s patented enhanced RPM operation.
RPM control maximizes transient response while allowing for smooth transitions between discontinuous frequency scaling operation and continuous mode full power operation.
The single-phase rails have an ultralow offset current monitor amplifier with programmable offset compensation for ultra high accuracy current monitoring.
The NCP81246 offers three internal MOSFET drivers with a single external PWM signal.
Two-Phase Rail Features • Dual Edge Modulation for Fastest Initial Response to Transient Loading • High Performance Operational Error Amplifier • Digital Soft Start Ramp • Dynamic Reference Injection® (Patent #US7057381) • Accurate Total Summing Current Amplifier(Patent #US6683441) • 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 25 V • Start-Up into Pre-Charged Loads While Avoiding False OVP • UltraSonic Operation • These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS Compliant www.
onsemi.
com 1 52 QFN52 MN SUFFIX CASE 485BE MARKING DIAGRAM NCP81246 FAWLYYWW G NCP81246 = Specific Device Code F = Wafer Fab A = Assembly Site WL = Lot ID YY = Year WW = Work Week G = Pb-Free Package ORDERING INFORMATION Device Package Shipping† NCP81...


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