IR3505

IR3505 DATA SHEET XPHASE3TM PHASE IC DESCRIPTION The IR3505 Phase IC combined with an IR XPhase3 Control IC provides a full featured and flexible way to implement power solutions for the latest high performance CPUs and ASICs. The “Control” IC provides overall system control and interfaces with any number of “Phase” ICs which each drive and monitor a single TM phase of a multiphase converter. The XPhase3 architecture results in a power supply that is smaller, less expensive, and easier to design while providing higher efficiency than conventional approaches. TM FEATURES 7V/2A gate drivers (4A GATEL sink current) Support converter output voltage up to 5.1 V (Limited to VCCL-1.4V) Support loss-less inductor current sensing Feed-forward voltage mode control Integrated boot-strap synchronous PFET Only four IC related external components per phase 3 wire analog bus connects Control and Phase ICs (VDAC, Error Amp, ISHARE) 3 wire digital bus for accurate daisy-chain phase timing control without external components Debugging function isolates phase IC from the converter Self-calibration of PWM ramp, current sense amplifier, and current share amplifier Single-wire bidirectional average current sharing Small thermally enhanced 16L 3 x 3mm MLPQ package RoHS compliant APPLICATION CIRCUIT www.DataSheet4U.com CCS RCS 12V 15 16 14 CSIN+ CSIN- EAIN 1 2 VCC 13 ISHARE DACIN LGND PHSIN SW 12 CIN 11 CBST 10 9 COUT L PHSOUT GATEL CLKIN PGND 6 Wire Bus t...