XRP2997 Datasheet | Exar

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 ±20m V, 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, overtemperature 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 Ro HS pliant, “green”/halogen free 8-pin Exposed Pad SOIC package. Rev. 1.2.0 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 - ±20m V 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 ponents - Pin/Function patible with SP2996B - Ro HS pliant “Green”/Halogen Free 8-Pin SOIC Package TYPICAL APPLICATION DIAGRAM Fig. 1: XRP2997 DDRIII VTT Application Diagram Exar Corporation 48720 Kato Road, Fremont CA 94538, USA .exar. Tel. +1 510 668-7000 - Fax. +1 510 668-7001 2A DDR I/II/III Bus Termination Regulator ABSOLUTE MAXIMUM RATINGS These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the...