ADP3206 Datasheet | Analog Devices

FEATURES Selectable 2-, 3-, or 4-phase operation at up to 1 MHz per phase 6-bit digitally programmable 0.8375 V to 1.6 V output ±10 m V DAC accuracy over temperature Logic-level PWM outputs for interface to external high power drivers Active current/thermal balancing between phases Built-in power good/crowbar blanking supports on-the-fly VID code changes Programmable deep sleep offset and deeper sleep reference voltage Programmable soft transient control to minimize inrush currents during output voltage changes Programmable short circuit protection with programmable latch-off delay .. FUNCTIONAL BLOCK DIAGRAM RAMPADJ RT 16 15 SD 13 UVLO SHUTDOWN AND BIAS OSCILLATOR CMP SET RESET EN GND 21 PWM1 TTMASK 22 TTSENSE 23 VRTT 24 THERMAL THROTTLING CONTROL CURRENTBALANCING CIRCUIT CMP CMP CMP CSREF 33 PWM2 RESET 2-/3-/4-PHASE DRIVER LOGIC 32 PWM3 RESET RESET PWM4 CROWBAR CURRENT LIMIT 28 27 26 SW1 SW2 SW3 SW4 CSSUM CSREF CSP PWRGD 12 DELAY 14 ILIMIT 17 DELAY CURRENTLIMITING CIRCUIT SOFT START 25 19 18 20 APPLICATIONS Desk-note and notebook PC power supplies for IMVP-5 pliant Intel® processors GENERAL DESCRIPTION The ADP3206 is a highly efficient multiphase synchronous buck-switching regulator controller optimized for converting the notebook main supply into the core supply voltage required by IMVP-5 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 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. The ADP3206 includes programmable no-load offset and slope functions to adjust the output voltage as a function of the load current so that it is always optimally positioned for a system...