ADP3290 ,VR11.1 2- to 4-Phase Synchronous Buck Controller3CIN3CIN1 CIN2680F680F 680FL1 C9R4370nH 18nF2700F/16V/3.3 Ax22.218ASANYO MV−WX SERIESVIN12V + ..
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ADP3290
VR11.1 2- to 4-Phase Synchronous Buck Controller
ADP3290
8-Bit, Programmable
2- to 4-Phase Synchronous
Buck ControllerThe ADP3290 is a highly efficient, multi−phase, synchronous buck
switching regulator controller optimized for converting a 12 V main
supply voltage into the core supply voltage of high performance Intel
processors. It uses an internal 8−bit DAC to read a Voltage
Identification (VID) code directly from the processor, to set the output
voltage between 0.5 V and 1.6 V.
This device uses a multi−mode control architecture to drive the
logic−level PWM outputs. The switching frequency can be
programmed according to VR size and efficiency. The chip can
provide 2−, 3− or 4−phase operation, allowing for the construction of
up to four complementary buck switching stages.
The ADP3290 also includes programmable no load offset and load
line slope setting function that adjusts the output voltage as a function
of the load current, optimally positioning it for a system transient. The
ADP3290 also provides accurate and reliable short−circuit protection,adjustable current limit, and a delayed power−good output that
accommodates On−The−Fly (OTF) output voltage changes requested
by the CPU.
Features Selectable 2−, 3−, or 4−Phase Operation at Up to 1 MHz Per Phase ±7 mV Worse−Case Differential Sensing Error Logic−Level PWM Outputs for Interface to External High Power
Drivers Fast−Enhanced PWM FlexMode� for Excellent Load Transient
Performance TRDET to Improve Load Release Active Current Balancing Between All Output Phases Built−In Power−Good/Crowbar Blanking Supports Dynamic
VID Code Changes Digitally Programmable 0.5 V to 1.6 V Output Supports
VR11.1 Specification Programmable Overcurrent Protection with Programmable
Latchoff Delay This is a Pb−Free Device
Typical Applications Desktop PC Power Supplies for: Next Generation Intel® Processors VRM Modules
