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  ON Semiconductor Electronic Components Datasheet  

ADP3209D Datasheet

Synchronous Buck Controller

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ADP3209D pdf
ADP3209D
5-Bit, Programmable,
Single-Phase, Synchronous
Buck Controller
The ADP3209D is a highly efficient, singlephase, synchronous
buck switching regulator controller. With its integrated drivers, the
ADP3209D is optimized for converting the notebook battery voltage
to render the supply voltage required by high performance Intel
chipsets. An internal 5bit DAC is used to read a VID code directly
from the chipset and to set the GMCH core voltage to a value within
the range of 0.4 V to 1.25 V.
The ADP3209D uses a multimode architecture. It provides
programmable switching frequency that can be optimized for
efficiency depending on the output current requirement. In addition,
the ADP3209D 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
ADP3209D 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 ADP3209D is specified over the extended commercial
temperature range of 0°C to 100°C and is available in a 32lead
LFCSP.
Features
SingleChip Solution
Fully Compatible with the Intel® GMCH Chipset Voltage Regulator
Specifications
Integrated MOSFET Drivers
Input Voltage Range of 3.3 V to 22 V
±8 mV WorstCase 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
5Bit, Digitally Programmable DAC with 0.4 V to 1.25 V Output
ShortCircuit Protection with Latchoff Delay
Output Current Monitor
32Lead LFCSP
This is a PbFree Device
Applications
Notebook Power Supplies for NextGeneration Intel Chipsets
http://onsemi.com
LFCSP32
CASE 932AE
MARKING DIAGRAM
ADP3209D
AWLYYWWG
A = Assembly Location
WL = Wafer Lot
YYWW = Date Code
G = PbFree Package
PIN ASSIGNMENT
FBRTN
FB
COMP
CREF
NC
IMON
IREF
RPM
32 25
1 24
ADP3209D
(top view)
8 17
9 16
VCC
BST
DRVH
SW
PVCC
DRVL
PGND
GND
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 26 of this data sheet.
© Semiconductor Components Industries, LLC, 2010
March, 2010 Rev. 0
1
Publication Order Number:
ADP3209D/D


  ON Semiconductor Electronic Components Datasheet  

ADP3209D Datasheet

Synchronous Buck Controller

No Preview Available !

ADP3209D pdf
ADP3209D
GND VCC EN
RPM RT RAMP VARFREQ
COMP
FB
LLINE
UVLO
Shutdown
and Bias
+Σ
REF +
VEA
+
CSREF
+Σ _
1.7 V
Oscillator
OVP
Driver
Logic
DAC + 200mV
CSREF
+
OCP
Shutdown
Delay
PWRGD
+
DAC 300mV
PWRGD
Open
Drain
PWRGD
Startup
Delay
FBRTN
Precision
Reference
Current
Limit
Circuit
Soft
Transient
Delay
Delay
Disable
VID
DAC
DAC
REF
Current
Monitor
+
SoftStart
BST
DRVH
SW
PVCC
DRVL
PGND
IMON
CSREF
CSFB
CSCOMP
ILIM
Figure 1. Functional Block Diagram
ABSOLUTE MAXIMUM RATINGS
Parameter
Rating
Unit
VCC
0.3 to +6.0
V
FBRTN, PGND
0.3 to +0.3
V
BST
DC
t < 200 ns
0.3 to +28
0.3 to +33
V
BST to SW
0.3 to +6.0
V
SW
DC
t < 200 ns
5 to +22
10 to +28
V
DRVH to SW
DC
0.3 to +6.0
V
DRVL to PGND
DC
t < 200 ns
0.3 to +6.0
0.3 to +6.0
5.0 to +6.0
V
RAMP (in Shutdown)
0.3 to +22
V
All Other Inputs and Outputs
0.3 to +6.0
V
Storage Temperature
65 to +150
°C
Operating Ambient Temperature Range
0 to 100
°C
Operating Junction Temperature
125 °C
Thermal Impedance (θJA) 2Layer Board
Lead Temperature
Soldering (10 sec)
Infrared (15 sec)
32.6 °C/W
°C
300
260
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
NOTE: This device is ESD sensitive. Use standard ESD precautions when handling.
http://onsemi.com
2


Part Number ADP3209D
Description Synchronous Buck Controller
Maker ON Semiconductor
Total Page 27 Pages
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