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ADP3211
7-Bit, Programmable, Single-Phase, Synchronous Buck Controller
ADP3211, ADP3211A
7-Bit, Programmable,
Single-Phase, Synchronous
Buck ControllerThe ADP3211 is a highly efficient, single−phase, synchronous
buck switching regulator controller. With its integrated driver, theADP3211 is optimized for converting the notebook battery voltage to
the supply voltage required by high performance Intel chipsets. An
internal 7−bit DAC is used to read a VID code directly from the
chip−set or the CPU and to set the GMCH render voltage or the CPU
core voltage to a value within the range of 0 V to 1.5 V.
The ADP3211 uses a multi−mode architecture. It provides
programmable switching frequency that can be optimized for
efficiency depending on the output current requirement. In addition,
the ADP3211 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
ADP3211 also provides accurate and reliable current overload
protection and a delayed power−good output. The IC supports
On−The−Fly (OTF) output voltage changes requested by the chip−set.
The ADP3211 has a boot voltage of 1.1 V for IMVP−6.5
applications in CPU mode. The ADP3211A has a boot voltage of
1.2 V in CPU mode.
The ADP3211 is specified over the extended commercial temperature
range of −40°C to 100°C and is available in a 32−lead QFN.
Features Single−Chip Solution Fully Compatible with the Intel® IMVP−6.5� CPU and GMCH
Chipset Voltage Regulator Specifications Integrated MOSFET
Drivers Input Voltage Range of 3.3 V to 22 V ±7 mV Worst−Case Differentially Sensed Core Voltage Error
Overtemperature Automatic Power−Saving 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 Built−in Power−Good Masking Supports Voltage Identification
(VID) OTF Transients 7−Bit, Digitally Programmable DAC with 0 V to 1.5 V Output Short−Circuit Protection Current Monitor Output Signal This is a Pb−Free Device Fully RoHS Compliant 32−Lead QFN
Applications
