NCP5391 ,2/3 Phase Buck Controller for VR11 Pentium IVFeaturesA = Assembly LocationWL = Wafer Lot•Meets Intel's VR 11.0 SpecificationYY = Year•Dual-Edg ..
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NCP5391
2/3 Phase Buck Controller for VR11 Pentium IV
NCP5391
2/3 Phase Buck Controller
for VR11 Pentium IV
Processor ApplicationsThe NCP5391 is a two- or three-phase buck controller which
combines differential voltage and current sensing, and adaptive
voltage positioning to power Intel's most demanding Pentium® IV
Processors and low voltage, high current power supplies. Dual-edge
pulse-width modulation (PWM) combined with inductor current
sensing reduces system cost by providing the fastest initial response
to transient loads thereby requiring less bulk and ceramic output
capacitors to satisfy transient load-line requirements.
A high performance operational error amplifier is provided, which
allows easy compensation of the system. The proprietary method of
Dynamic Reference Injection (Patented) makes the error amplifier
compensation virtually independent of the system response to VID
changes, eliminating the need for tradeoffs between load transients
and Dynamic VID performance.
Features•�Meets Intel's VR 11.0 Specification
•�Dual-Edge PWM for Fastest Initial Response to Transient Loading
•�High Performance Operational Error Amplifier
•�Supports VR11 Soft-Start Mode
•�Dynamic Reference Injection (Patent# 7057381)
•�8-Bit DAC per Intel's VR11 Specifications
•�DAC Range from 0.5 V to 1.6 V
•��0.5% System Voltage Accuracy
•�2 or 3-Phase Operation
•�True Differential Remote Voltage Sensing Amplifier
•�Phase-to-Phase Current Balancing
•�“Lossless” Differential Inductor Current Sensing
•�Differential Current Sense Amplifiers for each Phase
•�Adaptive Voltage Positioning (AVP)
•�Fixed No-Load V oltage Positioning at –19 mV
•�Frequency Range: 100 kHz – 1.0 MHz
•�Threshold Sensitive Enable Pin for VTT Sensing
•�Power Good Output with Internal Delays
•�Programmable Soft-Start Time
•�Operates from 12 V
•�This is a Pb-Free Device*
Applications•�Pentium IV Processors
•�VRM Modules
•�Graphics Cards
•�Low Voltage, High Current Power Supplies
