NCP5391 Datasheet, PDF (1/26 Pages) ON Semiconductor – 2/3 Phase Buck Controller for VR11 Pentium IV Processor Applications

NCP5391
2/3 Phase Buck Controller
for VR11 Pentium IV
Processor Applications
The 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
•ăMeets Intel's VR 11.0 Specification
•ăDual-Edge PWM for Fastest Initial Response to Transient Loading
•ăHigh Performance Operational Error Amplifier
•ăSupports VR11 Soft-Start Mode
•ăDynamic Reference Injection (Patent# 7057381)
•ă8-Bit DAC per Intel's VR11 Specifications
•ăDAC Range from 0.5 V to 1.6 V
•ă"0.5% System Voltage Accuracy
•ă2 or 3-Phase Operation
•ăTrue Differential Remote Voltage Sensing Amplifier
•ăPhase-to-Phase Current Balancing
•ă“Lossless” Differential Inductor Current Sensing
•ăDifferential Current Sense Amplifiers for each Phase
•ăAdaptive Voltage Positioning (AVP)
•ăFixed No-Load Voltage Positioning at –19 mV
•ăFrequency Range: 100 kHz – 1.0 MHz
•ăThreshold Sensitive Enable Pin for VTT Sensing
•ăPower Good Output with Internal Delays
•ăProgrammable Soft-Start Time
•ăOperates from 12 V
•ăThis is a Pb-Free Device*
Applications
•ăPentium IV Processors
•ăVRM Modules
•ăGraphics Cards
•ăLow Voltage, High Current Power Supplies
http://onsemi.com
1 32
QFN32, 5x5
MN SUFFIX
CASE 488AM
MARKING
DIAGRAM
1
NCP5391
AWLYYWWG
NCP5391 = Specific Device Code
A
= Assembly Location
WL
= Wafer Lot
YY
= Year
WW
= Work Week
G
= Pb-Free Package
*Pin 33 is the thermal pad on the bottom of the device.
ORDERING INFORMATION
Device
Package
Shipping^†
NCP5391MNR2G QFN32 3000 / Tape & Reel
(Pb-Free)
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specification
Brochure, BRD8011/D.
*For additional information on our Pb-Free strategy
and soldering details, please download the
ON Semiconductor Soldering and Mounting
Techniques Reference Manual, SOLDERRM/D.
©Ă Semiconductor Components Industries, LLC, 2007
1
July, 2007 - Rev. 1
Publication Order Number:
NCP5391/D