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  ON Semiconductor Electronic Components Datasheet  

NCP4208 Datasheet

VR11.1 Digital Programmable 8-Phase Synchronous Buck Converter

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NCP4208 pdf
NCP4208
VR11.1 Digital
Programmable 8-Phase
Synchronous Buck
Converter with I2C
Interface
The NCP4208 is an integrated power control IC with an I2C interface.
The NCP4208 is a highly efficient, multiphase, synchronous buck
switching regulator controller, which aids design of High Efficiency and
High Density solutions. The NCP4208 can be programmed for 1, 2,
3, 4, 5, 6, 7or 8phase operation, allowing for the construction of
up to 8 complementary buck switching stages.
The NCP4208 supports PSI, which is a power state indicator and
can be used to reduce the number of operating phases at light loads.
The I2C interface enables digital programming of key system
parameters to optimize system performance and provide feedback to
the system.
The NCP4208 has a built in shunt regulator that allows the part to be
powered from the +12 V system supply through a series resistor. The
NCP4208 is specified over the extended commercial temperature
range of 0°C to +85°C and is available in a 48 Lead QFN package.
Features
Selectable 1, 2, 3, 4, 5, 6, 7or 8Phase Operation at
Up to 1.5 MHz per Phase
Temperature Measurement
LogicLevel PWM Outputs for Interface to External High
Power Drivers
FastEnhanced PWM for Excellent Load Transient Performance
Active Current Balancing Between All Output Phases
BuiltIn PowerGood/Crowbar Blanking Supports
OnTheFly (OTF) VID Code Changes
Digitally Programmable 0.375 V to 1.6 V Output Supports
VR11.1 Specifications
Short Circuit Protection with Latchoff Delay
Supports PSI Power Saving Mode During Light Loads
This is a PbFree Device
Applications
Desktop PC
Servers
© Semiconductor Components Industries, LLC, 2013
September, 2013 Rev. 5
1
http://onsemi.com
1 48
QFN 48
CASE 485AJ
MARKING DIAGRAM
NCP4208
AWLYYWWG
A = Assembly Lot
WL = Wafer Lot
YY = Year
WW = Work Week
G = PbFree Package
PIN ASSIGNMENT
VCC3 1
PWRDG 2
ALERT 3
SDA 4
SCL 5
EN 6
GND 7
NC 8
NC 9
IMON 10
IREF 11
RT 12
PIN 1
INDICATOR
NCP4208
TOP VIEW
36 PWM3
35 PWM4
34 PWM5
33 PWM6
32 PWM7
31 PWM8
30 SW1
29 SW2
28 SW3
27 SW4
26 SW5
25 SW6
ORDERING INFORMATION
Device
NCP4208MNR2G
Package
Shipping
QFN48 2500/Tape & Reel
(PbFree)
†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:
NCP4208/D


  ON Semiconductor Electronic Components Datasheet  

NCP4208 Datasheet

VR11.1 Digital Programmable 8-Phase Synchronous Buck Converter

No Preview Available !

NCP4208 pdf
NCP4208
VCC
39
SHUNT
REGULATOR
VCC3
1
3.3 V
REGULATOR
UVLO
SHUTDOWN
GND 7
EN/VTT 6
850 mV
SCL SDA
54
SMBUS
RT RAMPADJ
12 13
OSCILLATOR
CONTROL
CSREF
CONTROL
PWRGD 2
DELAY
CONTROL
CURRENT
BALANCING
CIRCUIT
ALERT 3
COMPARATORS
EN
FB
FBRTN
IMON
MUX
DIGITAL
REGISTERS
ADC
CONTROL
CMP
CMP
CMP
CMP
CMP
CMP
CMP
SET EN
RESET
RESET
RESET
RESET
RESET
18 PHASE
DRIVER
LOGIC
RESET
RESET
48 PSI
21 ODN
22 OD1
38 PWM1
37 PWM2
36 PWM3
35 PWM4
34 PWM5
33 PWM6
32 PWM7
31 PWM8
CMP RESET
CROWBAR
CURRENT
LIMIT
30 SW1
29 SW2
28 SW3
27 SW4
26 SW5
25 SW6
24 SW7
23 SW8
ILIMIFS 20
IREF 11
COMP 15
CONTROL
CURRENT
MEASUREMENT
AND LIMIT
CONTROL
19 CSCOMP
17 CSREF
18 CSSUM
10 IMON
16 FB
NCP4208
PRECISION
REFERENCE
14
FBRTN
CONTROL
VID DAC
47 46 45 44 43 42 41 40
VID0 VID1 VID2 VID3 VID4 VID5 VID6 VID7
Figure 1. Simplified Block Diagram
BOOT VOLTAGE
AND SOFTSTART
CONTROL
http://onsemi.com
2


Part Number NCP4208
Description VR11.1 Digital Programmable 8-Phase Synchronous Buck Converter
Maker ON Semiconductor
Total Page 30 Pages
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