CM3196 Datasheet | California Micro Devices

Features - Ideal for DDR-I, -II VTT 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 VTT = VREF ± 30m V VTT = VDDQ/2 ± 2% - 8-pin SOIC or PSOP package - Lead-free versions available Product Description The CM3196 is a sinking and sourcing regulator specifically designed for DDR-I, -II VTT 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 VDDQ 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 VTT. For boards which support Suspend to RAM (STR) functionality, the CM3196 provides a Shutdown (SD) pin. When SD is set low, VTT 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. VREF voltage remains VDDQ/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. Applications - - - DDR-I, -II memory termination Active termination buses Graphics card memory termination Simplified Electrical Schematic AVIN VDDQ PVIN Over Temp Over Current Reference 50K Driver VREF 50K Buffer VSENSE © 2004 California Micro Devices Corp. All rights reserved. 04/22/04 430 N. Mc Carthy Blvd., Milpitas, CA 95035-5112 ▲ Tel: 408.263.3214 ▲ Fax: 408.263.7846 ▲ .calmicro. PACKAGE / PINOUT DIAGRAM TOP VIEW GND SD VSENSE V...