NCP5388 Datasheet, PDF (1/34 Pages) ON Semiconductor – 2/3/4 Phase Buck Controller for VR10 and VR11 Pentium IV Processor Applications

NCP5388
2/3/4 Phase Buck Controller
for VR10 and VR11 Pentium
IV Processor Applications
The NCP5388 is a two−, three−, or four−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 for easy compensation of the system. The proprietary method
of Dynamic Reference Injection (Patent Pending) 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 10.0, 10.1, 10.2, and 11.0 Specifications
• Dual−Edge PWM for Fastest Initial Response to Transient Loading
• High Performance Operational Error Amplifier
• Supports both VR11 and Legacy VR10 Soft−Start Modes
• Dynamic Reference Injection (Patent Pending)
• 8−Bit DAC per Intel’s VR11 Specifications
• DAC Range from 0.5 V to 1.6 V
• "0.75% System Voltage Accuracy
• Remote Temperature Sensing per VR11
• 2, 3, or 4−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
• Latched Overvoltage Protection (OVP)
• 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 40
40 PIN QFN, 7x7
MN SUFFIX
CASE 488AG
MARKING
DIAGRAM
1
NCP5388
AAWLYYWWG
NCP5388 = Specific Device Code
AA
= Assembly Location
WL
= Wafer Lot
YY
= Year
WW
= Work Week
G/G
= Pb−Free Package
*Pin 41 is the thermal pad on the bottom of the device.
ORDERING INFORMATION
Device
Package
Shipping^†
NCP5388MNR2G QFN−40 2500 / 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, 2010
1
June, 2010 − Rev. 11
Publication Order Number:
NCP5388/D