IR3507Z DATA SHEET TM XPHASE3 PHASE IC DESCRIPTION TM The IR3507Z 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. FEATURES IR3507Z 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 Figure 1 Application Circuit Page 1 of 19 IR Confidential April 2, 2009 IR3507Z ORDERING INFORMATION Part Number Package Order Quantity IR3507ZMTRPBF 20 Lead MLPQ 3000 per reel (4 x 4 mm body) * IR3507ZMPBF 20 Lead MLPQ 100 piece strips (4 x 4 mm body) * Samples only ABSOLUTE MAXIMUM RATINGS Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications are not implied. o Operating Junction Temperature.. 0 to 150 C o o Storage Temperature Range.-65 C to 150 C ESD RatingHBM Class 1C JEDEC Standard MSL Rating2 o Reflow Temperature.260 C PIN PIN NAME V V I I MAX MIN SOURCE SINK 1 IOUT 8V -0.3V 1mA 1mA 2 PSI 8V -0.3V 1mA 1mA 3 DACIN 3.3V -0.3V 1mA 1mA 4 LGND n/a n/a n/a n/a 5 PHSIN 8V -0.3V 1mA 1mA 6 NC n/a n/a n/a n/a 7 PHSOUT 8V -0.3V 2mA 2mA 8 CLKIN 8V -0.3V 1mA 1mA 9 PGND 0.3V -0.3V 5A for 100ns, n/a 200mA DC 10 GATEL 8V -0.3V DC, -5V for 5A for 100ns, 5A for 100ns, 100ns 200mA DC 200mA DC 11 NC n/a n/a n/a n/a 12 VCCL 8V -0.3V n/a 5A for 100ns, 200mA DC 13 BOOST 40V -0.3V 1A for 100ns, 3A for 100ns, 100mA DC 100mA DC 14 GATEH 40V -0.3V DC, -5V for 3A for 100ns, 3A for 100ns, 100ns 100mA DC 100mA DC 15 SW 34V -0.3V DC, -5V for 3A for 100ns, n/a 100ns 100mA DC 16 VCC 34V -0.3V n/a 10mA 17 CSIN+ 8V -0.3V 1mA 1mA 18 CSIN- 8V -0.3V 1mA 1mA 19 EAIN 8V -0.3V 1mA 1mA 20 NC n/a n/a n/a n/a Note: 1. Maximum GATEH SW = 8V 2. Maximum BOOST GATEH = 8V Page 2 of 19 IR Confidential April 2, 2009