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RT9173AGS Datasheet(PDF) 1 Page - Richtek Technology Corporation |
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RT9173AGS Datasheet(HTML) 1 Page - Richtek Technology Corporation |
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1 / 13 page  RT9173/A 1 DS9173/A-18 March 2007 www.richtek.com Features Support Both DDR 1 (1.25VTT) and DDR 2 (0.9VTT) Requirements SOP-8, TO-252-5 and TO-263-5 Packages Capable of Sourcing and Sinking 3A Peak Current 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 RoHS Compliant and 100% Lead (Pb)-Free Pin Configurations Applications DDR Memory Termination Active Termination Buses Supply Splitter Peak 3A Bus Termination Regulator Ordering Information General Description The RT9173/A regulator is designed to convert voltage supplies ranging from 1.6V to 6V into a desired output voltage which adjusted by two external voltage divider resistors. The regulator is capable of sourcing or sinking up to 3A of peak current while regulating an output voltage to within 2% (DDR 1) and 3% (DDR 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. (TOP VIEW) TO-263-5 (RT9173A) 4 2 3 5 1 VOUT REFEN VCNTL (TAB) GND VIN TO-252-5 (RT9173A) 4 2 3 5 1 VOUT REFEN VCNTL (TAB) GND VIN 2 3 4 5 8 7 6 VCNTL VIN GND REFEN VOUT VCNTL VCNTL VCNTL SOP-8 (RT9173) Note : RichTek Pb-free and Green products are : RoHS compliant and compatible with the current require- ments of IPC/JEDEC J-STD-020. Suitable for use in SnPb or Pb-free soldering processes. 100%matte tin (Sn) plating. RT9173/A Package Type M5 : TO-263-5 L5 : TO-252-5 S : SOP-8 Operating Temperature Range P : Pb Free with Commercial Standard G : Green (Halogen Free with Commer- cial Standard) 3A Sink & Source 1.5A Sink & Source |
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