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ADP3208D
7-Bit, Programmable, Dual-Phase, Mobile, CPU, Synchronous Buck Controller
ADP3208D
7-Bit, Programmable,
Dual-Phase, Mobile, CPU,
Synchronous Buck
ControllerThe 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
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
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 theload current so that the core voltage is always optimally positioned for
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 Single−Chip Solution Fully Compatible with the Intel® IMVP−6+�
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 V oltage Error Overtemperature Automatic Power−Saving Mode Maximizes Efficiency
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 V oltage
Identification (VID) OTF Transients 7−Bit, Digitally Programmable DAC with 0.3 V to Short−Circuit Protection with Latchoff Delay Clock Enable Output Delays the CPU Clock Until the
Core Voltage is Stable Output Load Current Monitor This is a Pb−Free Device
Applications Notebook Power Supplies for Next Generation
Intel® Processors
