Description
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 switchingfrequency 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 V2TM 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
(Picture: Pinout)
