IR3505ZMTRPBF International Rectifier, IR3505ZMTRPBF Datasheet - Page 16

• Manufacturer Part Number: IR3505ZMTRPBF
• Description: IC XPHASE3 CTLR 2.5A 16-MLPQ
• Manufacturer: International Rectifier
• Series: XPhase3™r

Specifications of IR3505ZMTRPBF

• Package / Case: 16-MLPQ
• Mounting Type: Surface Mount
• Current - Supply: 3mA
• Voltage - Supply: 8 V ~ 16 V
• Operating Temperature: 0°C ~ 125°C
• Applications: Processor
• Supply Voltage Range: 4.75V To 7.5V, 8V To 16V
• Operating Temperature Range: 0°C To +125°C
• Digital Ic Case Style: MLPQ
• No. Of Pins: 16
• Termination Type: SMD
• Function: For High Performance CPUs And ASICs
• Rohs Compliant: Yes
• Filter Terminals: SMD
• Controller Type: XPhase
• Package: 16-Lead MLPQ
• Circuit: X-Phase Phase IC
• Iout (a): 2.5A Gate Driver
• Pbf: PbF Option Available
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

LAYOUT GUIDELINES
The following layout guidelines are recommended to reduce the parasitic inductance and resistance of the
PCB layout, therefore minimizing the noise coupled to the IC.
• Dedicate at least one middle layer for a ground plane.
• Separate analog bus (EAIN, DACIN, and ISHARE) from digital bus (CLKIN, PHSIN, and PHSOUT) to
• Connect PGND and LGND pins to the ground plane through vias.
• Place current sense resistors and capacitors (R
• Place the decoupling capacitor C
• Place the phase IC as close as possible to the MOSFETs to reduce the parasitic resistance and
• Place the input ceramic capacitors close to the drain of top MOSFET and the source of bottom MOSFET.
• There are two switching power loops. One loop includes the input capacitors, top MOSFET, inductor,
reduce the noise coupling.
the inductor current sense wires, but separate the two wires by ground polygon or route as a differential
pair. The wire from the inductor terminal to CSIN- should not cross over the fast transition nodes, i.e.
switching nodes, gate drive outputs and bootstrap nodes.
inductance of the gate drive paths.
Use a combination of different packages of ceramic capacitors.
output capacitors and the load; another loop consists of bottom MOSFET, inductor, output capacitors and
the load. Route the switching power paths using wide and short traces or polygons; use multiple vias for
connections between layers.
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VCCL
as close as possible to the VCCL pin.
CS
and C
CS
) close to phase IC. Use Kelvin connection for
March 17, 2009
IR3505Z