ADP3194

www.DataSheet4U.com 6-Bit, Programmable 2-/3-/4-Phase, Synchronous Buck Controller ADP3194 FEATURES Selectable 2-, 3-, or 4-phase operation Up to 1 MHz per phase ±9.5 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 OTF 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 SHUNT REGULATOR UVLO SHUTDOWN AND BIAS OSCILLATOR SET RESET EN 27 PWM1 RAMPADJ 14 RT 13 ADP3194 EN 11 GND 19 CMP DAC + 150mV CSREF CMP CURREN TBALANCING CIRCUIT RESET 2-/3-/4-PHASE DRIVER LOGIC RESET 26 PWM2 CMP 25 PWM3 DAC – 250mV CMP PWRGD 10 DELAY RESET CURRENT LIMIT 23 SW1 ILIMIT 15 EN 22 SW2 21 SW3 20 SW4 CURREN TLIMIT CIRCUIT SOFT START 17 CSSUM 16 CSREF 18 CSCOMP 24 PWM4 CROWBAR APPLICATIONS Desktop PC power supplies for Next-generation Intel® processors VRM modules Games consoles DELAY 12 COMP 9 8 FB PRECISION REFERENCE 7 FBRTN 1 2 3 VID DAC 4 5 6 06022-001 VID4 VID3 VID2 VID1 VID0 VID5 Figure 1. Functional Block Diagram GENERAL DESCRIPTION The ADP3194 1 is a highly efficient, multiphase, synchronous buck switching regulator controller optimized for converting a 5 V or 12 V main supply into the core supply voltage required...