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NCP4200 Datasheet, PDF (1/32 Pages) ON Semiconductor – Programmable Multi-Phase Synchronous Buck Converter with PMBus | |||
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NCP4200
Programmable Multi-Phase
Synchronous Buck
Converter with PMBus
The NCP4200 is an integrated power control IC with a PMBus
interface. It combines a highly efficient, multiâphase, synchronous
buck switching regulator controller with a PMBus interface, which
enables digital programming of key system parameters to optimize
system performance and provide feedback to the system.
It uses an internal 8âbit DAC to read a Voltage Identification (VID)
code directly from the processor, which is used to set the output
voltage between 0.375 V and 1.6 V.
This device uses a multiâmode PWM architecture to drive the
logicâlevel outputs at a programmable switching frequency that can
be optimized for VR size and efficiency. The NCP4200 can be
programmed to provide 2â, 3â, or 4âphase operation, allowing for the
construction of up to four complementary buckâswitching stages. The
NCP4200 supports PSI, which is a Power Save Mode.
The NCP4200 includes a PMBus interface which can be used to
program system set points such as voltage offset, loadâline and phase
balance and output voltage. Key system performance data, such as
CPU current, CPU voltage, and power and fault conditions can also be
read back over the PMBus from the NCP4200.
The NCP4200 is specified over the extended commercial
temperature range of 0°C to +85°C and is available in a 40 Lead QFN
package.
Features
⢠Selectable 2â, 3â, or 4âPhase Operation at Up to 1.5 MHz per Phase
⢠PMBus Interface â Enables Digital Programmability of Set Points
and Readâback of Monitored Values
⢠LogicâLevel PWM Outputs for Interface to External High Power
Drivers
⢠FastâEnhanced PWM for Excellent Load Transient Performance
⢠Active Current Balancing Between All Output Phases
⢠BuiltâIn PowerâGood/Crowbar Blanking Supports OnâTheâFly
(OTF) VID Code Changes
⢠Digitally Programmable 0.375 V to 1.6 V Output Supports Both
VR11 and VR11.1 Specifications
⢠Programmable ShortâCircuit Protection with Programmable
Latchoff Delay
⢠Supports PSI â Power Saving Mode During Light Loads
Applications
⢠Desktop PC Power Supplies for VRM Modules
© Semiconductor Components Industries, LLC, 2009
1
September, 2009 â Rev. 0
http://onsemi.com
1 40
QFN40 6x6
CASE 488AR
MARKING DIAGRAM
NCP4200
AWLYYWWG
A
= Assembly Location
WL = Wafer Lot
YYWW = Date Code
G
= PbâFree Package
PIN ASSIGNMENT
VCC3 1
ALERT 2
FAULT 3
SDA 4
SCL 5
EN 6
GND 7
IMON 8
IREF 9
RT 10
PIN 1
INDICATOR
NCP4200
TOP VIEW
30 VCC
29 PWM1
28 PWM2
27 PWM3
26 PWM4
25 SW1
24 SW2
23 SW3
22 SW4
21 OD1
ORDERING INFORMATION
Device*
Package
Shippingâ
NCP4200MNR2G QFN40 2500/Tape & Reel
*The âGâ suffix indicates PbâFree package.
â 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.
Publication Order Number:
NCP4200/D
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