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NCP3218A Datasheet (PDF) - ON Semiconductor - 7-Bit, Programmable, 3-Phase, Mobile CPU Synchronous Buck Controller


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ADP3212A, NCP3218A
7-Bit, Programmable,
3-Phase, Mobile CPU
Synchronous Buck Controller
  The APD3212A/NCP3218A is a highly efficient, multi-phase,
synchronous buck switching regulator controller. With its integrated
drivers, the APD3212A/NCP3218A is optimized for converting the                                http://onsemi.com
notebook battery voltage into the core supply voltage required by high
performance Intel processors. An internal 7-bit DAC is used to read a
VID code directly from the processor and to set the CPU core voltage
                                                                                                                   QFN48
to a value within the range of 0.3 V to 1.5 V. The APD3212A/                                                     CASE 485AJ
NCP3218A is programmable for 1-, 2-, or 3-phase operation. The
output signals ensure interleaved 2- or 3-phase operation.                                 1 48
  The APD3212A/NCP3218A uses a multimode architecture run at a
programmable switching frequency and optimized for efficiency                                                      QFN48
depending on the output current requirement. The                                                                 CASE 485AN
APD3212A/NCP3218A switches between single- and multi-phase                                 1 48
operation to maximize efficiency with all load conditions. The chip
includes a programmable load line slope function to adjust the output                         MARKING DIAGRAM
voltage as a function of the load current so that the core voltage is
                                                                                               1
always optimally positioned for a load transient. The
APD3212A/NCP3218A also provides accurate and reliable                                               xxP321xA
short-circuit protection, adjustable current limiting, and a delayed                               AWLYYWWG
power-good output. The IC supports On-The-Fly (OTF) output
voltage changes requested by the CPU.
  The APD3212A/NCP3218A are specified over the extended                                 xxx= Specific Device Code
commercial temperature range of -40



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