CM3196

• Ideal for DDR-I, -II V_TT applications
• Sinks and sources 2A for DDR-I, 0.6A for DDR-II
• Shutdown input to support ACPI states
• Operates down to 1.5V input voltage
• Integrated power MOSFETs
• Overcurrent protection
• Over temperature protection
• Excellent accuracy
      V_TT = VREF ± 30mV
      V_TT = VDDQ/2 ± 2%
• 8-pin SOIC or PSOP package
• Lead-free versions available

The CM3196 is a sinking and sourcing regulator specifically designed for DDR-I, -II V_TT bus termination. The output voltage accurately tracks VDDQ/2. For DDR-I it can source and sink current up to 2A with a load regulation of 0.5%. This current adequately serves both single and dual channel DDR-I memory systems. For power conscious notebook applications, the CM3196 also operates from a V_DDQ of 1.5V or 1.8V with less current drive. For DDR-II applications, the CM3196 provides up to 0.6A at 0.9V to drive the memory controller V_TT.

For boards which support Suspend to RAM (STR) functionality, the CM3196 provides a Shutdown (SD) pin. When SD is set low, V_TT will be in tri-state mode, causing the output to go high impedance. In this mode, CM3196 power is saved by significantly reducing the quiescent current. V_REF voltage remains V_DDQ/2.

The CM3196 provides overcurrent and over temperature protection. These features protect the chip from excessive heating due to high current and high temperature.

The CM3196 is housed in an 8-pin SOIC or PSOP package and is available with optional lead-free finishing.