NCP5380_12 Datasheet, PDF (1/28 Pages) ON Semiconductor – 7-Bit, Programmable, Single-Phase, Synchronous Buck Switching Regulator Controller

NCP5380, NCP5380A
7-Bit, Programmable,
Single-Phase, Synchronous
Buck Switching Regulator
Controller
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
http://onsemi.com
MARKING
DIAGRAM
1 32
QFN32, 5x5
CASE 488AM
MN SUFFIX
1
NCP5380
AWLYYWWG
G
NCP5380 = Specific Device Code
A
= Assembly Location
WL = Wafer Lot
YY
= Year
WW = Work Week
G
= Pb Free Package
(Note: Microdot may be in either location)
PIN CONFIGURATION
1
PWRGD
IMON
N/C
FBRTN
FB
COMP
GND
ILIM
NCP5380
(Top View)
VCC
BST
DRVH
SW
PVCC
DRVL
PGND
GND
ORDERING INFORMATION
Device
Package
Shipping^†
NCP5380MNR2G QFN−32 5000 / Tape & Reel
(Pb−Free)
NCP5380AMNR2G QFN−32 5000 / Tape & Reel
(Pb−Free)
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
© Semiconductor Components Industries, LLC, 2011
1
April, 2011 − Rev. 3
Publication Order Number:
NCP5380/D