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ADP3207C Datasheet(PDF) 1 Page - ON Semiconductor

Part No. ADP3207C
Description  7-Bit Programmable, Multi-Phase Mobile, CPU Synchronous Buck Controller
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Manufacturer  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

ADP3207C Datasheet(HTML) 1 Page - ON Semiconductor

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© Semiconductor Components Industries, LLC, 2009
December, 2009 − Rev. 0
1
Publication Order Number:
ADP3207C/D
ADP3207C
7-Bit Programmable,
Multi-Phase Mobile, CPU
Synchronous Buck
Controller
The ADP3207C is a high efficiency, multi−phase, synchronous,
buck−switching regulator controller optimized for converting
notebook battery voltage into the core supply voltage required by high
performance Intel processors. The part uses an internal 7−bit
Digital−to−Analog 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 3−phase operation, allowing for the construction of
up to three interleaved buck−switching stages.
The ADP3207C uses a multi−mode architecture to drive the
logic−level PWM outputs at a programmable switching frequency that
can be optimized depending on the output current requirement. The
part switches between multi−phase and single−phase 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 short−circuit
protection, adjustable current limiting, and a delayed power−good
output that accommodates On−the−Fly (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 40−lead
LFCSP.
The ADP3207CF has a soft−start time one tenth of ADP3207C.
There are no other differences between the ADP3207C and
ADP3207CF.
Features
1−, 2−, or 3−Phase Operation at Up to 750 kHz per Phase
$7 mV Worst−Case 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 Power−Saving 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
Built−In, Power−Good Masking Supports VID OTF
7−Bit Digitally Programmable 0.3 V to 1.5 V Output
Overload and Short−Circuit Protection Latchoff Delay
Built−In, 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 Pb−Free Device
Applications
Notebook Power Supplies for Next Generation
Intel® Processors
MARKING DIAGRAMS
http://onsemi.com
See detailed ordering and shipping information in the package
dimensions section on page 31 of this data sheet.
ORDERING INFORMATION
LFCSP40
CASE 932AC
ADP3207C
AWLYYWWG
ADP3207C
CF
AWLYYWWG
A
= Assembly Location
WL
= Wafer Lot
YYWW = Date Code
G
= Pb−Free Package


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