Product Description
The CM3107 is a sinking and sourcing regulator specifically designed for series-parallel bus termination for high-speed chip set busses as well as DDR memory systems. It can source and sink current up to 2.0A with a load regulation of 0.5%. The VTT output voltage is selectable by VDDQSEL and FSBSEL pins. The VDDQSEL pin controls whether the CM3107 is in DDR memory mode with VTT=VDDQ/2, or in FSB mode. In FSB mode, FSBSEL controls whether VTT is 1.225V or 1.45V. This allows the same chip to be used in two different circuits on an Intel 865-based motherboard.

Features
• Ideal for Intel 865 Front Side Bus VTT and DDR VTT applications
• Sinks and sources 2 Amps
• Over current protection
• Over temperature protection
• Integrated power MOSFETs
• Excellent accuracy (0.5% load regulation)
• Selectable output (1.225V/1.45V or VDDQ/2)
• 8-lead SOIC and PSOP packages
• Lead-free versions available

Applications
• Intel 865/845 Front Side Bus termination
• Single and dual DDR memory termination
• Active termination buses
• Graphics card DDR memory termination