NCP5318 Datasheet, PDF (1/31 Pages) ON Semiconductor – Two/Three/Four−Phase Buck CPU Controller

NCP5318
Two/Three/Four−Phase
Buck CPU Controller
The NCP5318 provides full−featured and flexible control
conforming to the Intel® VRM 10.1 specification for
high−performance CPUs. The IC can be programmed as a two−,
three− or four−phase buck controller, and the per−phase switching
frequency can be as high as 1.0 MHz. Combined with external gate
drivers and power components, the controller implements a compact,
highly integrated multi−phase buck converter.
Enhanced V²â„¢ control inherently compensates for variations in
both line and load, and achieves current sharing between phases. This
control scheme provides fast transient response, reducing the need for
large banks of output capacitors and higher switching frequency.
Features
• Switching Regulator Controller
♦ Programmable 2/3/4 Phase Operation
♦ Lossless Current Sensing
♦ Enhanced V² Control Method Provides Fast Transient Response
♦ Programmable Up to 1.0 MHz Switching Frequency Per Phase
♦ Programmable Adaptive Voltage Positioning
♦ Programmable Soft−Start Time
• Current Sharing
♦ Differential Current Sense Pins for Each Phase
♦ Current Sharing Within 10% Between Phases
• Protection Features
♦ Programmable Latching Overcurrent Protection
♦ “111110” and “111111” DAC Code Fault
♦ Latched Overvoltage Protection
♦ Undervoltage Lockout
♦ External Enable Control
♦ Three−State MOSFET Driver Control through DRVON Signal
• System Power Management
♦ 6−Bit DAC with 0.5% Tolerance Compatible with VRM 10.1
Specification
♦ Programmable Lower Power Good Threshold
♦ Power Good Output with Delay
♦ Pre−set No Load Offset Voltage
• Pb−Free Package is Available*
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
http://onsemi.com
MARKING
DIAGRAM
LQFP−32
FT SUFFIX
CASE 873A
NCP5318
AWLYYWWG
A
= Assembly Location
WL = Wafer Lot
YY
= Year
WW = Work Week
G
= Pb−Free Package
PIN CONNECTIONS
(Top View)
V_ID2
V_ID3
V_ID4
PWRLS
V_FFB
SS
PWRGD
DRVON
I_LIM
R_OSC
V_CC
GATE1
GATE2
GATE3
GATE4
GND
ORDERING INFORMATION
Device
Package
Shipping^†
NCP5318FTR2 LQFP−32 2000 Tape & Reel
NCP5318FTR2G LQFP−32 2000 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.
© Semiconductor Components Industries, LLC, 2006
1
June, 2006 − Rev. 4
Publication Order Number
NCP5318/D