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XRP2997IDB-F Datasheet(PDF) 1 Page - Exar Corporation |
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XRP2997IDB-F Datasheet(HTML) 1 Page - Exar Corporation |
1 / 8 page X XR RP P2 29 99 97 7 2 2A A D DD DR R II/ /IIII/ /IIIIII B Bu us s T Te errm miin na attiio on n R Re eg gu ulla atto orr July 2011 Rev. 1.0.0 Exar Corporation www.exar.com 48720 Kato Road, Fremont CA 94538, USA Tel. +1 510 668-7000 – Fax. +1 510 668-7001 GENERAL DESCRIPTION The XRP2997 is a Double Data Rate (DDR) termination voltage regulator supporting all power requirements of DDR I, II and III memories and is capable of sinking or sourcing 2A continuously. Tightly regulating its output voltage within ±20mV, the XRP2997 converts input voltages as low as 1.1V while the output voltage is adjustable through an external resistor divider or by forcing the VREF pin voltage. It maintains a fast line and load transient response and only requires an output capacitance of 22µF to operate. An enable function via an external MOSFET and a soft start feature allow for a controlled implementation of power-up sequencing. Built-in source/sink overcurrent, over- temperature and under-voltage lockout protections insure safe operation under abnormal operating conditions. The XRP2997 meets JEDEC SSTL-2, SSTL-18, HSTL, SCSI-1 and SCSI-3 specifications for DDR SDRAM memories. The XRP2997 is offered in a RoHS compliant, “green”/halogen free 8-pin Exposed Pad SOIC package. APPLICATIONS DDR I/II/III Memory Termination Active Termination Buses Audio-Video Equipments Video-Graphics Cards FEATURES DDR1, DDR2 and DDR3 Support 0.75VTT Generation ±20mV Output Voltage Offset 2 Amps Continuous Current Sourcing & Sinking 1.1V to 5.5V Wide Input Voltage Range Adjustable Output Voltage Suspend to RAM(STR), Enable & Soft Start Functions Stable with 22µF Ceramic Capacitor UVLO, Over Temperature and Over Current Protections Minimal External Components Pin/Function Compatible with SP2996B RoHS Compliant “Green”/Halogen Free 8-Pin SOIC Package TYPICAL APPLICATION DIAGRAM Fig. 1: XRP2997 DDRIII VTT Application Diagram |
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