NCP5380 Datasheet, PDF (1/27 Pages) ON Semiconductor – 7-Bit, Programmable, Single-Phase, Synchronous Buck Switching Regulator Controller

NCP5380
7-Bit, Programmable,
Single-Phase, Synchronous
Buck Switching Regulator
Controller
General Description
The NCP5380 is a highly efficient, single−phase, synchronous buck
switching regulator controller. With its integrated drivers, the
NCP5380 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 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 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 also provides accurate and reliable current overload
protection and a delayed power−good output. The IC supports
on−the−fly output voltage changes requested by the chipset.
The NCP5380 is specified over the extended commercial
temperature range of 0°C to 85°C and 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)
On−the−fly Transients
• 7−bit, Digitally Programmable DAC
• Short−circuit Protection with Programmable Latch−off 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)
†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, 2009
1
May, 2009 − Rev. 0
Publication Order Number:
NCP5380/D