6-Bit Programmable 2-, 3-, 4-Phase Synchronous Buck Controller
The ADP3180 is a highly efficient multiphase synchronous buck Switching Regulator controller optimized for converting a 12 V main supply into the core supply voltage required by high performance Intel processors. It uses an internal 6-bit DAC to read a voltage identification (VID) code directly from the processor, which is used to set the output voltage between 0.8375 V and 1.6 V, and uses a multimode PWM architecture to drive the Logic level outputs at a programmable switching frequency that CAN be optimized for VR size and efficiency. The phase relationship of the output signals CAN be programmed to provide 2-, 3-, or 4-phase operation, allowing for the construction of up to four complementary buck switching stages.
The ADP3180 also includes programmable no-load offset and slope functions to adjust the output voltage as a function of the load current so that it is always optimally positioned for a system transient. The ADP3180 also provides accurate and reliable short Circuit Protection adjustable current limiting, and a delayed Power Good output that accommodates on-the-fly output voltage changes requested by the CPU.
By Analog Devices, Inc.
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