IR3500VMPBF International Rectifier, IR3500VMPBF Datasheet - Page 32

• Manufacturer Part Number: IR3500VMPBF
• Description: The IR3500V Control IC combined with one or more xPhase3 Phase IC implement the control and MOSFET driver functions for a VR11.1 CPU VTT power supply.
• Manufacturer: International Rectifier

Specifications of IR3500VMPBF

• Package: 32-Lead MLPQ
• Circuit: X-Phase Control IC
• Switch Freq (khz): 250kHz to 1.5MHz
• Pbf: PbF Option Available

SOLDER RESIST
• The solder resist should be pulled away from the metal lead lands by a minimum of 0.06mm. The solder resist
• The minimum solder resist width is 0.13mm.
• At the inside corner of the solder resist where the lead land groups meet, it is recommended to provide a fillet so a
• The land pad should be Solder Mask Defined (SMD), with a minimum overlap of the solder resist onto the copper
• Ensure that the solder resist in-between the lead lands and the pad land is ≥ 0.15mm due to the high aspect ratio of
• The four vias in the land pad should be tented or plugged from bottom board side with solder resist.
mis-alignment is a maximum of 0.05mm and it is recommended that the lead lands are all Non Solder Mask
Defined (NSMD). Therefore pulling the S/R 0.06mm will always ensure NSMD pads.
solder resist width of ≥ 0.17mm remains.
of 0.06mm to accommodate solder resist mis-alignment. In 0.5mm pitch cases it is allowable to have the solder
resist opening for the land pad to be smaller than the part pad.
the solder resist strip separating the lead lands from the pad land.
Page 32 of 34
July 28, 2008
IR3500V