ADP3208D
7-Bit, Programmable,
Dual-Phase, Mobile, CPU,
Synchronous Buck
Controller
The ADP3208D is a highly efficient, multiphase, synchronous buck
switching regulator controller. With its integrated drivers, the
ADP3208D is optimized for converting the notebook battery voltage
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into the core supply voltage required by high performance Intel
processors. An internal 7−bit DAC is used to read a VID code directly
from the processor and to set the CPU core voltage to a value within
the range of 0.3 V to 1.5 V. The phase relationship of the output signals
ensures interleaved 2−phase operation.
The ADP3208D uses a multi−mode architecture run at a
LFCSP48
CASE 932AD
MARKING DIAGRAM
programmable switching frequency and optimized for efficiency
depending on the output current requirement. The ADP3208D
switches between single− and dual−phase operation to maximize
efficiency with all load conditions. The chip 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
ADP3208D
AWLYYWWG
a load transient. The ADP3208D also provides accurate and reliable
short−circuit protection, adjustable current limiting, and a delayed
power−good output. The IC supports On−The−Fly (OTF) output
voltage changes requested by the CPU.
The ADP3208D is specified over the extended commercial
temperature range of −10°C to 100°C and is available in a 48−lead
LFCSP.
Features
A
= Assembly Location
WL = Wafer Lot
YYWW = Date Code
G
= Pb−Free Package
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 36 of this data sheet.
• Single−Chip Solution
• Fully Compatible with the Intel® IMVP−6+t
• Short−Circuit Protection with Latchoff Delay
• Clock Enable Output Delays the CPU Clock Until the
Specifications
• Integrated MOSFET Drivers
• Input Voltage Range of 3.3 V to 22 V
• Selectable 1− or 2−Phase Operation with Up to 1 MHz
per Phase Switching Frequency
• Guaranteed ±8 mV Worst−Case Differentially Sensed
Core Voltage Error Overtemperature
• Automatic Power−Saving Mode Maximizes Efficiency
Core Voltage is Stable
• Output Load Current Monitor
• This is a Pb−Free Device
Applications
• Notebook Power Supplies for Next Generation
Intel® Processors
with Light Load During 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 Blanking Supports Voltage
Identification (VID) OTF Transients
• 7−Bit, Digitally Programmable DAC with 0.3 V to
1.5 V Output
© Semiconductor Components Industries, LLC, 2010
1
February, 2010 − Rev. 0
Publication Order Number:
ADP3208D/D