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IR3505ZMTRPBF
Phase IC combined with and XPhase3 Control IC for high performance CPUs and ASICs
International
TOR Rectifier IR3505Z
DATA SHEET
XPHASE3TM PHASE IC
DESCRIPTION
The IR3505Z 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
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
cos RCS
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Bus to "ll-o-- me 800:3:T 10 ollr u ' . ' L (:J VOUT+
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VCCL D
Page 1 of 20 March 17, 2009
International
TOR Rectifier IR3505Z
ORDERING INFORMATION
Part Number Package Order Quantity
IR3505ZMTRPBF 16 Lead MLPQ 3000 per reel
(3 x 3 mm body)
* IR3505ZMPBF
16 Lead MLPQ
100 piece strips
(3 x 3 mm body)
* Samples only
ABSOLUTE MAXIMUM RATINGS
Stresses beyond those listed below 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.
Operating Junction Temperature............ ..... 0°C to 150°C
Storage Temperature Range ...................... -65°C to 150°C
MSL Rating ............................................. 2
Reflow Temperature .................................. 260°C
PIN # PIN NAME VMAX me ISOURCE lsmK
1 ISHARE 8V -0.3V 1mA 1mA
2 DACIN 3.3V -0.3V 1mA 1mA
3 LGND n/a n/a n/a n/a
4 PHSIN 8V -0.3V 1mA 1mA
5 PHSOUT 8V -0.3V 2mA 2mA
6 CLKIN 8V -0.3V 1mA 1mA
7 PGND 0.3V -0.3V 5A for 100ns, n/a
200mA DC
8 GATEL 8V -O.3V DC, -5V for 5A for 100ns, 5A for 100ns,
100ns 200mA DC 200mA DC
9 VCCL 8V -0.3V n/a 5A for 100ns,
200mA DC
10 BOOST 34V -0.3V IA for 100ns, 3A for 100ns,
100mA DC 100mA DC
11 GATEH 34V -0.3V DC, -5V for 3A for 100ns, 3A for 100ns,
100ns 100mA DC 100mA DC
12 SW 34V -0.3V DC, -5V for 3A for 100ns, n/a
100ns 100mA DC
13 VCC 18V -0.3V n/a 10mA
14 CSIN+ 8V -0.3V 1mA 1mA
15 CSIN- 8V -0.3V 1mA 1mA
16 EAIN 8V -0.3V 1mA 1mA
1. Maximum GATEH - SW = 8V
2. Maximum BOOST - GATEH = 8V
Page 2 of 20 March 17, 2009
