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 V
2
™
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
♦
http://onsemi.com
MARKING DIAGRAMS
32
1
32 PIN QFN
MN SUFFIX
CASE 485J
(Bottom View)
NCP5314
AWLYYWW
•
Switching Regulator Controller
Programmable 2/3/4 Phase Operation
♦
Lossless Current Sensing
♦
Enhanced V
2
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
LQFP−32
FTB SUFFIX
CASE 873A
32
1
NCP5314
AWLYYWW
A
= Assembly Location
WL
= Wafer Lot
YY
= Year
WW
= Work Week
Text orientation may vary.
PIN CONNECTIONS
V
ID1
V
ID0
V
ID5
ENABLE
CS2N
CS2P
CS1N
CS1P
V
ID2
V
ID3
V
ID4
PWRLS
V
FFB
SS
PWRGD
DRVON
32 31 30 29 28 27 26 25
24
1
23
2
22
3
21
4
20
5
19
6
18
7
17
8
9 10 11 12 13 14 15 16
SGND
V
DRP
V
FB
COMP
CS4N
CS4P
CS3N
CS3P
I
LIM
R
OSC
V
CC
GATE1
GATE2
GATE3
GATE4
GND
ORDERING INFORMATION
Device
NCP5314MNR2
NCP5314FTR2
Package
32 Pin QFN
LQFP−32
Shipping
†
2000 Tape & Reel
2000 Tape & Reel
†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, 2004
1
September, 2004 − Rev. 9
Publication Order Number
NCP5314/D
ONSEMI [ ON SEMICONDUCTOR ]
