NCP5314_07 Datasheet, PDF (1/29 Pages) ON Semiconductor – Two/Three/Four−Phase Buck CPU Controller

NCP5314
Two/Three/Four−Phase
Buck CPU Controller
The NCP5314 provides full−featured and flexible control for the
latest 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 1.2 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 the industry’s fastest transient response,
reducing the need for large banks of output capacitors and higher
switching frequency.
The controller meets VR(M)10.x specifications with all the required
functions and protection features.
Features
• Switching Regulator Controller
♦ Programmable 2/3/4 Phase Operation
♦ Lossless Current Sensing
♦ Enhanced V² Control Method Provides Fast Transient Response
♦ Programmable Up to 1.2 MHz Switching Frequency Per Phase
♦ 0 to 100% Adjustment of Duty Cycle
♦ Programmable Adaptive Voltage Positioning Reduces Output
Capacitor Requirements
♦ Programmable Soft−Start
• Current Sharing
♦ Differential Current Sense Pins for Each Phase
♦ Current Sharing Within 10% Between Phases
• Protection Features
♦ Programmable Pulse−by−Pulse Current Limit for Each Phase
♦ “111110” and “111111” DAC Code Fault
♦ Latching Off Overvoltage Protection
♦ Programmable Latching Overcurrent Protection
♦ Undervoltage Lockout
♦ External Enable Control
♦ Three−State MOSFET Driver Control through Driver−On Signal
• System Power Management
♦ 6−Bit DAC with 0.5% Tolerance Compatible with VR(M)10.x
Specification
♦ Programmable Lower Power Good Threshold
♦ Power Good Output
• Pb−Free Package is Available
© Semiconductor Components Industries, LLC, 2007
1
January, 2007 − Rev. 10
http://onsemi.com
32 PIN QFN
MN SUFFIX
CASE 485J
(Bottom View)
MARKING DIAGRAMS
32
1
NCP5314
AWLYYWW
LQFP−32
FTB SUFFIX
CASE 873A
NCP5314
AWLYYWWG
32
1
A = Assembly Location
WL = Wafer Lot
YY = Year
WW = Work Week
G = Pb−Free Package
PIN CONNECTIONS
V_ID2
V_ID3
V_ID4
PWRLS
V_FFB
SS
PWRGD
DRVON
32 31 30 29 28 27 26 25
1
24
2
23
3
22
4
21
5
20
6
19
7
18
8
17
9 10 11 12 13 14 15 16
I_LIM
R_OSC
V_CC
GATE1
GATE2
GATE3
GATE4
GND
ORDERING INFORMATION
Device
Package
Shipping^†
NCP5314MNR2 32 Pin QFN 2500 Tape & Reel
NCP5314FTR2 LQFP−32 2000 Tape & Reel
NCP5314FTR2G 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.
Publication Order Number:
NCP5314/D