Synchronous Buck Controller ADP3212 NCP3218

GENERAL DESCRIPTION
The ADP3212/NCP3218 is a highly efficient, multiphase, synchronous buck switching regulator controller. With its integrated drivers, the ADP3212/NCP3218 is optimized for converting the 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 to a value within the range of 0.3 V to 1.5 V. The ADP3212/NCP3218 is programmable for 1-, 2-, or 3-phase operation. The output signals ensure interleaved 2- or 3-phase operation. The ADP3212/NCP3218 uses a multimode architecture run at a programmable switching frequency and optimized for efficiency depending on the output current requirement. The ADP3212/NCP3218 switches between single- and multi-phase operation to maximize efficiency with all load conditions. The chip includes a programmable load line slope function to adjust the output voltage as a function of the load current so that the core voltage is always optimally positioned for a load transient. The ADP3212/NCP3218 also provides accurate and reliable shortcircuit
protection, adjustable current limiting, and a delayed power-good output. The IC supports on-the-fly output voltage changes requested by the CPU.
The ADP3212/NCP3218 are specified over the extended commercial temperature range of -40ÅãC to 100ÅãC. The ADP3212 is available in a 48-lead QFN 7x7mm 0.5 mm pitch package. The NCP3218 is available in a 48-lead QFN 6x6mm 0.4 mm pitch package. Except for the packages, the ADP3212 and NCP3218 are identical. ADP3212 and NCP3218 are Halogen- Free, Pb-Free and RoHS compliant.

FEATURES
Single-chip solution Fully compatible with the Intel IMVP-6.5 specifications Selectable 1- , 2-, or 3-phase operation with up to 1 MHz per phase switching frequency Phase 1 and Phase 2 Integrated MOSFET drivers
Input Voltage Range of 3.3 V to 22 V Guaranteed ±8 mV worst-case differentially sensed core voltage error over temperature Automatic power-saving mode maximizes efficiency with light load during deeper sleep operation Active current balancing between output phases Independent current limit and load line setting inputs for additional design flexibility Built-in power-good blanking supports voltage identification (VID) on-the-fly transients 7-bit, digitally programmable DAC with 0.3 V to 1.5 V output Short-circuit protection with programmable latch-off delay Clock enable output delays the CPU clock until the core voltage is stable Output power or current monitor options 48-lead QFN 6x6mm (NCP3218) 48-lead QFN 7x7mm (ADP3212).

APPLICATIONS
Notebook power supplies for next-generation Intel processors

Note:
Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.

Full System Precision CCFL Driver MP1015

 

ncp3218