Two/Three/Four-Phase Buck CPU Controller - ON Semiconductor
Description
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 V2™ 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)
VID1 VI...
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