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NCP5380
Synchronous Buck Controller, Switching Regulator, Single Phase, 7-Bit, Programmable
NCP5380, NCP5380A
7-Bit, Programmable,
Single-Phase, Synchronous
Buck Switching Regulator
Controller
General DescriptionThe 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 forefficiency 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 V oltage 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
