The ADP3188 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. The part 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. It 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 the construction of up to four complementary buck switching stages.
The ADP3188 also includes programmable no-load offset and slope functions to adjust the output voltage as a function of the load current, so it is always optimally positioned for a system transient. The ADP3188 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. The ADP3188 is specified over the commercial temperature range of 0°C to 85°C and is available in 28-lead, TSSOP and QSOP packages.
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