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The RT9173D is a simple, cost-effective and high-speed linear regulator designed to generate termination voltage in double data rate (DDR) memory system to comply with the JEDEC SSTL_2 and SSTL_18 or other specific interfaces such as HSTL, SCSI-2 and SCSI-3 etc. devices requirements. The regulator is capable of actively sinking or sourcing continuous 2A or up to 3A transient peak current while regulating an output voltage to within 40mV. The output termination voltage cab be tightly regulated to track 1/2VDDQ by two external voltage divider resistors or the desired output voltage can be pro-grammed by externally forcing the REFEN pin voltage.
The RT9173D also incorporates a high-speed differential amplifier to provide ultra-fast response in line/load transient. Other features include extremely low initial offset voltage, excellent load regulation, current limiting in bi-directions and on-chip thermal shut-down protection.
The RT9173D are available in the SOP-8 (Exposed Pad) surface mount packages.
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  • DDR, DDR-II 和 DDR-III VTT 应用的理想选择
  • 电流吐纳能力
  • 2A 连续电流
  • 峰值 3A 电流支持 DDR 和 DDR-II
  • 峰值 2.5A 电流支持 DR-III
  • 集成功率 MOSFET
  • 为 SSTL_2, SSTL_18, HSTL, SCSI-2 和 SCSI-3 接口生成终端匹配电压
  • 全负载范围内的高精度输出电压
  • 输出由两只外部电阻调整
  • 外部元件数量少
  • 关机时对 RAM 的挂起状态呈现为高阻输出
  • 电流限制保护
  • 内置热保护
  • PSOP-8 封装
  • VIN 和 VCNTL 之间无电源时序问题
  • 符合 RoHS 规范，完全无铅
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Desktop PCs, Notebooks, and Workstations Graphics Card Memory Termination Set Top Boxes, Digital TVs, Printers Embedded Systems Active Termination Buses DDR-I, DDR-II and DDR-III Memory Systems
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