ADP3198

www.DataSheet4U.com 8-Bit Programmable 2- to 4-Phase Synchronous Buck Controller ADP3198 FEATURES Selectable 2-, 3-, or 4-phase operation at up to 1 MHz per phase ±11 mV worst-case differential sensing error over temperature Logic-level PWM outputs for interface to external high power drivers Enhanced PWM flex mode 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 Digitally programmable 0.5 V to 1.6 V output supports both VR10.x and VR11 specifications Programmable short-circuit protection with programmable latch-off delay FUNCTIONAL BLOCK DIAGRAM VCC 31 RT RAMPADJ 12 13 SHUNT REGULATOR UVLO SHUTDOWN GND 18 850mV EN 1 OSCILLATOR + – 19 OD PWM1 PWM2 CMP – + DAC + 150mV CSREF DAC – 500mV + – – + SET EN RESET RESET 30 CURRENT BALANCING CIRCUIT CMP – + 29 CMP – + CMP – + 28 PWM3 RESET 2/3/4-PHASE DRIVER LOGIC 27 PWM4 RESET PWRGD 2 DELAY CROWBAR CURRENT LIMIT 25 SW1 SW2 SW3 SW4 CSCOMP CSREF CSSUM IMON TTSENSE 10 VRHOT 9 VRFAN 8 THERMAL THROTTLING CONTROL 24 23 22 17 APPLICATIONS Desktop PC power supplies for next generation Intel® processors VRM modules ILIMIT 11 DELAY 7 CURRENT MEASUREMENT AND LIMIT + – 15 16 21 IREF 20 COMP 5 4 FB LLSET PRECISION REFERENCE FBRTN 3 The ADP3198 is a highly efficient, multiphase, synchronous buck switching regulator controller optimized for converting a 12 V main supply into the core supply voltage ...