ADP3168

www.DataSheet4U.com 6-Bit, Programmable 2-, 3-, 4-Phase Synchronous Buck Controller ADP3168 FEATURES Selectable 2-, 3-, or 4-phase operation at up to 1 MHz per phase ±10 mV worst-case differential sensing error over temperature Logic-level PWM outputs for interface to external high power drivers Active current balancing between all output phases Built-in Power Good/crowbar blanking supports On-the-fly VID code changes 6-bit digitally programmable 0.8375 V to 1.6 V output Programmable short-circuit protection with programmable latch-off delay FUNCTIONAL BLOCK DIAGRAM VCC 28 RAMPADJ 14 RT 13 ADP3168 UVLO SHUTDOWN AND BIAS 11 OSCILLATOR SET EN 27 EN 19 CMP RESET GND DAC +150mV CMP RESET CSREF CURRENTBALANCING CIRCUIT CMP DAC –250mV CMP RESET 2-, 3-, 4-PHASE DRIVER LOGIC RESET PWM1 26 PWM2 25 PWM3 24 PWM4 APPLICATIONS Desktop PC power supplies for: Next generation Intel® processors VRM modules 10 DELAY CROWBAR CURRENT LIMIT 23 PWRGD SW1 22 SW2 GENERAL DESCRIPTION The ADP3168 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 c...