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ADP3207C Datasheet

CPU Synchronous Buck Controller

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ADP3207C pdf
ADP3207C
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7-Bit Programmable,
Multi-Phase Mobile, CPU
Synchronous Buck
Controller
The ADP3207C is a high efficiency, multiphase, synchronous,
buckswitching regulator controller optimized for converting
notebook battery voltage into the core supply voltage required by high
performance Intel processors. The part uses an internal 7bit
DigitaltoAnalog Converter (DAC) to read Voltage Identification
(VID) code directly from the processor that sets the output voltage.
The phase relationship of the output signals can be programmed to
provide 1, 2, or 3phase operation, allowing for the construction of
up to three interleaved buckswitching stages.
The ADP3207C uses a multimode architecture to drive the
logiclevel PWM outputs at a programmable switching frequency that
can be optimized depending on the output current requirement. The
part switches between multiphase and singlephase operation to
maximize its effectiveness under all load conditions. In addition, the
ADP3207C includes a programmable slope function to adjust the
output voltage as a function of the load current. As a result, it is always
best positioned for a system transient.
The chip also provides accurate and reliable shortcircuit
protection, adjustable current limiting, and a delayed powergood
output that accommodates OntheFly (OTF) output voltage changes
requested by the CPU.
The ADP3207C is specified over the extended commercial
temperature range of 10°C to 100°C and is available in a 40lead
LFCSP.
The ADP3207CF has a softstart time one tenth of ADP3207C.
There are no other differences between the ADP3207C and
ADP3207CF.
http://onsemi.com
LFCSP40
CASE 932AC
MARKING DIAGRAMS
ADP3207C
AWLYYWWG
ADP3207C
CF
AWLYYWWG
A = Assembly Location
WL = Wafer Lot
YYWW = Date Code
G = PbFree Package
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 31 of this data sheet.
Features
1, 2, or 3Phase Operation at Up to 750 kHz per Phase
$7 mV WorstCase Differential Sensing Error
Overtemperature
Input Voltage Range of 3.3 V to 22 V
Interleaved PWM Outputs for Driving External High
Power MOSFET Drivers
Enhanced PWM FlexModet for Excellent Load
Transient Performance
Automatic PowerSaving Modes Maximize Efficiency
During Light Load and Deeper Sleep Operation
Soft Transient Control Reduces Inrush Current and
Audio Noise
Active Current Balancing Between Output Phases
Independent Current Limit and Load Line Setting
Inputs for Additional Design Flexibility
BuiltIn, PowerGood Masking Supports VID OTF
7Bit Digitally Programmable 0.3 V to 1.5 V Output
Overload and ShortCircuit Protection Latchoff Delay
BuiltIn, Clock Enable Output Delays CPU Clock Until
CPU Supply Voltage Stabilizes
Current Monitor Output Signals the Total Output Power
of the Buck Converter
This is a PbFree Device
Applications
Notebook Power Supplies for Next Generation
Intel® Processors
© Semiconductor Components Industries, LLC, 2009
December, 2009 Rev. 0
1
Publication Order Number:
ADP3207C/D


  ON Semiconductor Electronic Components Datasheet  

ADP3207C Datasheet

CPU Synchronous Buck Controller

No Preview Available !

ADP3207C pdf
ADP3207C
www.DataSheet4U.com
COMP
FB
LLINE
PSI
TTSNS
VRTT
+
REF
+
UVLO
Shutdown
and Bias
Oscillator
VEA
+
S
+ CSREF
S_
1.7V
+
OVP
Current
Balancing
Circuit
Thermal
Throttle
Control
Driver
Logic
PWRGD
DAC 200 mV
CSREF
+
DAC 300 mV
+
PWRGD
Open
Drain
CLKEN
FBRTN
CLKEN
Open
Drain
Precision
Reference
VID
DAC
OCP
Shutdown
Delay
PWRGD
Startup
Delay
CLKEN
Startup
Delay
CLougrriecnt
Limit
CiCrcuurirtent
Monitor
Soft
Transient
Delay
Delay
Disable
DPRSTP
DPRSLP
LDogPicRSLP
IMCOuNrrent
Monitor
+
DAC
REF
SoftStart
Soft Transient
PWM1
PWM2
PWM3
OD
DCM
SW1
SW2
SW3
DPRSTP
DPRSTP
IMON
CSREF
CSSUM
CSCOMP
ILIMN
ILIMP
Figure 1. Functional Block Diagram
http://onsemi.com
2


Part Number ADP3207C
Description CPU Synchronous Buck Controller
Maker ON Semiconductor
Total Page 30 Pages
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