ADP3207D

ADP3207D 7-Bit Programmable, Multi-Phase Mobile, CPU Synchronous Buck Controller The ADP3207D is a high efficiency, multi−phase, synchronous, buck−switching regulator controller optimized for converting notebook battery voltage into the core supply voltage required by high performance Intel processors. The part uses an internal 7−bit Digital−to−Analog Converter (DAC) to read Voltage Identification (VID) code directly from the processor that sets the output voltage. The phase relationship of the output signals can be programmed to provide 1−, 2−, or 3−phase operation, allowing for the construction of up to three interleaved buck−switching stages. The ADP3207D uses a multi−mode architecture to drive the logic−level PWM outputs at a programmable switching frequency that can be optimized depending on the output current requirement. The part switches between multi−phase and single−phase operation to maximize its effectiveness under all load conditions. In addition, the ADP3207D includes a programmable slope function to adjust the output voltage as a function of the load current. As a result, it is always best positioned for a system transient. The chip also provides accurate and reliable short−circuit protection, adjustable current limiting, and a delayed power−good output that accommodates On−the−Fly (OTF) output voltage changes requested by the CPU. The ADP3207D is specified over the extended commercial temperature range of −10°C to 100°C and is available in a 40−lead LFCSP. The...