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NCP5385 Datasheet, PDF (1/34 Pages) ON Semiconductor – 2/3/4 Phase Buck Controller for VR10 and VR11 Pentium IV Processor Applications | |||
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NCP5385
2/3/4 Phase Buck Controller
for VR10 and VR11 Pentium
IV Processor Applications
The NCP5385 is a twoâ, threeâ, or fourâphase buck controller
which combines differential voltage and current sensing, and
adaptive voltage positioning to power Intelâs most demanding
Pentium® IV Processors and low voltage, high current power
supplies. Dualâedge pulseâwidth 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 loadâline 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 Intelâs VR 10.0, 10.1, 10.2, and 11.0 Specifications
⢠DualâEdge PWM for Fastest Initial Response to Transient Loading
⢠High Performance Operational Error Amplifier
⢠Supports both VR11 and Legacy VR10 SoftâStart Modes
⢠Dynamic Reference Injection (Patented)
⢠8âBit DAC per Intelâs VR11 Specifications
⢠DAC Range from 0.5 V to 1.6 V
⢠"0.5% System Voltage Accuracy
⢠2, 3, or 4âPhase Operation
⢠True Differential Remote Voltage Sensing Amplifier
⢠PhaseâtoâPhase Current Balancing
⢠âLosslessâ Differential Inductor Current Sensing
⢠Differential Current Sense Amplifiers for each Phase
⢠Adaptive Voltage Positioning (AVP)
⢠Fixed NoâLoad Voltage Positioning at â19 mV
⢠Frequency Range: 100 kHzâ1.0 MHz
⢠Threshold Sensitive Enable Pin for VTT Sensing
⢠Power Good Output with Internal Delays
⢠Programmable SoftâStart Time
⢠Operates from 12 V
⢠This is a PbâFree Device*
Applications
⢠Pentium IV Processors
⢠VRM Modules
⢠Graphics Cards
⢠Low Voltage, High Current Power Supplies
http://onsemi.com
MARKING
DIAGRAM
1 40
40 PIN QFN, 7x7
MN SUFFIX
CASE 488AG
1
NCP5385
AWLYYWWG
NCP5385 = Specific Device Code
A
= Assembly Location
WL
= Wafer Lot
YY
= Year
WW
= Work Week
G
= PbâFree Package
*Pin 41 is the thermal pad on the bottom of the device.
ORDERING INFORMATION
Device
NCP5385MNR2G
Package
Shippingâ
QFNâ40 2500 / Tape & Reel
(PbâFree)
â 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 PbâFree 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 â Rev. 2
Publication Order Number:
NCP5385/D
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