ADP3191

www.DataSheet4U.com 6-Bit, Programmable 2-/3-/4-Phase, Synchronous Buck Controller ADP3191 FEATURES Selectable 2-, 3-, or 4-phase operation at up to 1 MHz per phase ±14.5 mV worst-case differential sensing error over temperature Logic-level PWM outputs for interface to external high power drivers PWM Flex-ModeTM architecture for excellent load transient performance 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 SHUNT REGULATOR (ADP3191 ONLY) OSCILLATOR EN 11 GND 19 DAC+150mV CSREF CURRENT BALANCING CIRCUIT CMP RESET 2-/3-/4-PHASE DRIVER LOGIC CMP DAC–250mV CMP PWRGD 10 DELAY RESET CURRENT LIMIT 24 26 UVLO SHUTDOWN AND BIAS SET CMP RESET EN 27 PWM1 PWM2 RESET 25 PWM3 PWM4 CROWBAR 23 22 SW1 SW2 SW3 SW4 CSSUM CSREF APPLICATIONS Desktop PC power supplies for Next-generation Intel® processors VRM modules Games consoles ILIMIT 15 EN CURRENT LIMIT CIRCUIT 21 20 17 DELAY 12 16 18 CSCOMP GENERAL DESCRIPTION The ADP3191/ADP3191A1 are highly efficient, multiphase, synchronous buck switching regulator controllers optimized for converting a 5 V or 12 V main supply into the core supply voltage required by high performance Intel processors. They use an internal 6-bit DAC to read a voltage identification (VID) code di...