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ADP3211A Datasheet

Synchronous Buck Controller

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ADP3211A pdf
ADP3211, ADP3211A
7-Bit, Programmable,
Single-Phase, Synchronous
Buck Controller
The ADP3211 is a highly efficient, singlephase, synchronous
buck switching regulator controller. With its integrated driver, the
ADP3211 is optimized for converting the notebook battery voltage to
the supply voltage required by high performance Intel chipsets. An
internal 7bit DAC is used to read a VID code directly from the
chipset or the CPU and to set the GMCH render voltage or the CPU
core voltage to a value within the range of 0 V to 1.5 V.
The ADP3211 uses a multimode architecture. It provides
programmable switching frequency that can be optimized for
efficiency depending on the output current requirement. In addition,
the ADP3211 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
ADP3211 also provides accurate and reliable current overload
protection and a delayed powergood output. The IC supports
onthefly (OTF) output voltage changes requested by the chipset.
The ADP3211 has a boot voltage of 1.1 V for IMVP6.5
applications in CPU mode. The ADP3211A has a boot voltage of
1.2 V in CPU mode.
The ADP3211 is specified over the extended commercial temperature
range of 10°C to 100°C and is available in a 32lead QFN.
Features
SingleChip Solution
Fully Compatible with the Intel® IMVP6.5t CPU and GMCH
Chipset Voltage Regulator Specifications Integrated MOSFET
Drivers
Input Voltage Range of 3.3 V to 22 V
www.DataS±he7emt4UV.cWomorstCase Differentially Sensed Core Voltage Error
Overtemperature
Automatic PowerSaving 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
Builtin PowerGood Masking Supports Voltage Identification
(VID) OTF Transients
7Bit, Digitally Programmable DAC with 0 V to 1.5 V Output
ShortCircuit Protection
Current Monitor Output Signal
This is a PbFree Device
Fully RoHS Compliant
32Lead QFN
Applications
Notebook Power Supplies for Next Generation Intel Chipsets
Intel Netbook Atom Processors
http://onsemi.com
1 32
QFN32
MN SUFFIX
CASE 488AM
MARKING DIAGRAM
1
xxxxxx
xxxxxx
AWLYYWW
xxx = Specific Device Code
A = Assembly Location
WL = Wafer Lot
YY = Year
WW = Work Week
PIN ASSIGNMENT
PWRGD
IMON
CLKEN
FBRTN
FB
COMP
GPU
ILIM
1
ADP3211
ADP3211A
(top view)
VCC
BST
DRVH
SW
PVCC
DRVL
PGND
GND
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 31 of this data sheet.
© Semiconductor Components Industries, LLC, 2009
April, 2009 Rev. 0
1
Publication Order Number:
ADP3211/D


  ON Semiconductor Electronic Components Datasheet  

ADP3211A Datasheet

Synchronous Buck Controller

No Preview Available !

ADP3211A pdf
ADP3211, ADP3211A
GND VCC EN
RPM RT RAMP
PVCC
COMP
FB
LLINE
PWRGD
CLKEN
FBRTN
UVLO Shutdown
and Bias
Oscillator
REF
VEA
+
S
+
+
+ S C_SREF
DAC + 200mV
CSREF
+
1.55V
OVP
+
DAC 300 mV
PWRGD
Open
Drain
PWRGD
Startup
Delay
CLKEN
Open
Drain
Precision
Reference
CLKEN
Start Up
Delay
Current
Limit
Circuit
Soft
Transient
Delay
Delay
Disable
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VID
DAC
DAC
MOSFET
Driver
OCP
Shutdown
Delay
Current
Monitor
+
Soft Start
and Soft
Transient
Control
REF
BST
DRVH
SW
DRVL
PGND
IMON
CSREF
CSFB
CSCOMP
ILIM
GPU
Figure 1. Functional Block Diagram
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2


Part Number ADP3211A
Description Synchronous Buck Controller
Maker ON Semiconductor
Total Page 30 Pages
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