ADP3193

www.DataSheet4U.com 8-Bit Programmable 2- to 3-Phase Synchronous Buck Controller ADP3193 FEATURES Selectable 2- or 3-phase operation at up to 1 MHz per phase ±7.7 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 23 RT RAMPADJ 9 10 SHUNT REGULATOR UVLO SHUTDOWN GND 14 850mV EN 1 OSCILLATOR + – 15 OD PWM1 PWM2 PWM3 CMP – + DAC + 150mV CSREF DAC – 350mV + – – + CURRENT BALANCING CIRCUIT SET EN RESET 22 21 CMP – + RESET 2/3-PHASE DRIVER LOGIC 20 CMP – + RESET CURRENT LIMIT 19 18 PWRGD 2 DELAY CROWBAR SW1 SW2 SW3 CSCOMP CSREF CSSUM APPLICATIONS Desktop PC power supplies for Next generation Intel® processors VRM modules ILIMIT 8 DELAY 7 17 13 CURRENT MEASUREMENT AND LIMIT + – 11 12 IREF 16 COMP 5 4 FB PRECISION REFERENCE FBRTN 3 The ADP3193 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 8-bit DAC to read a voltage identification ...