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IR3507MTRPBF Datasheet(PDF) 1 Page - International Rectifier |
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IR3507MTRPBF Datasheet(HTML) 1 Page - International Rectifier |
1 / 19 page IR3507 Page 1 of 19 Jan 09, 2008 DATA SHEET XPHASE3TM PHASE IC DESCRIPTION The IR3507 Phase IC combined with an IR XPhase3TM 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 XPhase3TM architecture results in a power supply that is smaller, less expensive, and easier to design while providing higher efficiency than conventional approaches. FEATURES IR3507 PHASE IC • Power State Indicator (PSI) interface provides the capability to maximize the efficiency at light loads. • 7V/2A gate drivers (4A GATEL sink current) • Converter output voltage up to 5.1 V (Limited to VCCL-1.4V) • Loss-less inductor current sensing • Feed-forward voltage mode control • Integrated boot-strap synchronous PFET • Only four external components per phase • 3 wire analog bus connects Control and Phase ICs (VID, Error Amp, IOUT) • 3 wire digital bus for accurate daisy-chain phase timing control without external components • Anti-bias circuitry prevents excessive sag in output voltage during PSI de-assertion • PSI input is ignored during power up • 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 20L 4 X 4mm MLPQ package • RoHS compliant APPLICATION CIRCUIT VOUT- 12V CLKIN PHSOUT PHSIN VCCL VOUT+ IOUT DACIN EAIN PSI CCS CVCCL DACIN 3 GATEH 14 VCCL 12 BOOST 13 PHSIN 5 IOUT 1 SW 15 LGND 4 PSI 2 NC 11 IR3507 COUT L RCS CBST Figure 1 Application Circuit |
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