RT9173A

RT9173/A 1.5A/3A Bus Termination Regulator General Description www.datasheet4u.com The RT9173/A Features z regulator is designed to convert Support Both DDR 1 (1.25VTT) and DDR 2 (0.9VTT) Requirements Power TO-263-5 and SOP-8 Packages Capable of Sourcing and Sinking Current 1.5A/3A Current-limiting Protection Thermal Protection Integrated Power MOSFETs Generates Termination Voltages for SSTL-2 High Accuracy Output Voltage at Full-load Adjustable VOUT by External Resistors Minimum External Components Shutdown for Standby or Suspend Mode Operation with High-impedance Output voltage supplies ranging from 1.8V to 6V into a desired output voltage which adjusted by two external resistors, voltage divider. The regulator is capable of sourcing or sinking up to 1.5A/3A of current while regulating an output voltage to within 2% or less. The RT9173/A, used in conjunction with series termination resistors, provides an excellent voltage source for active termination schemes of high speed transmission lines as those seen in high speed memory buses and distributed backplane designs. The voltage output of the regulator can be used as a termination voltage for DDR SDRAM. Current limits in both sourcing and sinking mode, plus on-chip thermal shutdown make the circuit tolerant of the output fault conditions. z z z z z z z z z z Pin Configurations Part Number RT9173ACM5 (Plastic TO-263-5) Pin Configurations TOP VIEW 1. 2. 3. 4. 5. VIN GND VCNTL (TAB) REFEN VOUT Applications z z z z z Comp...