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IR3505Z Datasheet(PDF) 1 Page - International Rectifier |
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IR3505Z Datasheet(HTML) 1 Page - International Rectifier |
1 / 20 page IR3505Z Page 1 of 20 March 17, 2009 DATA SHEET XPHASE3 TM PHASE IC DESCRIPTION The IR3505Z Phase IC combined with an IR XPhase3 TM 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 phase of a multiphase converter. The XPhase3 TM architecture results in a power supply that is smaller, less expensive, and easier to design while providing higher efficiency than conventional approaches. 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 |
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