NCP5380

General Description

The NCP5380/A is a highly efficient, single−phase, synchronous buck switching regulator controller. With its integrated drivers, the NCP5380/A is optimized for converting the silver box voltage to the supply voltage required by high performance Intel chipsets. An internal 7−bit DAC is used to read a VID code directly from the chipset.
The NCP5380/A uses a multimode architecture. It provides programmable switching frequency that can be optimized for efficiency depending on the output current requirement. In addition, the NCP5380/A includes a programmable load line slope function to adjust the output voltage as a function of the load current so that the core voltage is always optimally positioned for a load transient. The NCP5380/A also provides accurate and reliable current overload protection and a delayed power−good output. The IC supports On−The−Fly (OTF) output voltage changes requested by the chipset.
The NCP5380 is specified over the temperature range of 0°C to 85°C, while the NCP5380A extends the temperature range to −40°C to 100°C. The NCP5380/A is available in a 32−lead QFN.

Features

• Single−chip Solution
• Fully Compatible with the Intel VR11 CPU Chipset Voltage Regulator Specifications
• Integrated MOSFET Drivers
• ±8 mV Worst−case Differentially Sensed Core Voltage Error over Temperature
• Automatic Power−saving Modes Maximize Efficiency During Light Load Operation
• Soft Transient Control Reduces Inrush Current and Audio Noise
• Independent Current Limit and Load Line Setting Inputs for Additional Design Flexibility
• Built−in Power−good Masking Supports Voltage Identification (VID) OTF Transients
• 7−bit, Digitally Programmable DAC
• Short−circuit Protection with Programmable Latchoff Delay
• Current Monitor Output Signal
• 32−lead QFN
• This is a Pb−Free Device Applications
• Desktop Power Supplies for Next−generation Intel Chipsets

Documents:
datasheet