NCP5389 Datasheet, PDF (1/28 Pages) ON Semiconductor – 2/3 Phase Buck Controller for VR11 Pentium IV Processor Applications

NCP5389
2/3 Phase Buck Controller
for VR11 Pentium IV
Processor Applications
The NCP5389 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
• "0.75% 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 Voltage 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
http://onsemi.com
1 32
QFN32, 5x5
MN SUFFIX
CASE 488AM
MARKING
DIAGRAM
1
NCP5389
AWLYYWWG
NCP5389 = 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^†
NCP5389MNR2G 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.
© Semiconductor Components Industries, LLC, 2008
1
October, 2008 − Rev. 2
Publication Order Number:
NCP5389/D