ADP3206

2-/3-/4-Phase Synchronous Buck Controller for IMVP-5 CPUs ADP3206 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 mV 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 www.DataSheet4U.com FUNCTIONAL BLOCK DIAGRAM VCC 35 RAMPADJ RT 16 15 SD 13 UVLO SHUTDOWN AND BIAS OSCILLATOR CMP SET RESET EN 34 GND 21 PWM1 ADP3206 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 31 PWM4 CROWBAR CURRENT LIMIT 28 27 26 SW1 SW2 SW3 SW4 CSSUM CSREF CSCOMP 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 compliant 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 v...