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RT9045A 是易用、低成本的高速线性调节器,用于生成 DDR 存储器系统的终端电压以符合其需要。该调节器具有 1.8A 的电流吐纳能力,能将其输出电压稳定在 20mV 误差以内。仅利用两只电阻构成的分压器,其输出电压即可紧随 VDDQ / 2 而变;也可利用外部强加在 REFEN 的电压使其输出电压成为可以按需设定的。利用内建的高速差分放大器,RT9045A 可对输入/输出的瞬变过程具有快速响应能力。它还具有超低初始偏移电压、卓越的负载调整特性、双向电流限制和片内过热保护功能。
DDR VTT 应用的理想选择
电流吐纳能力:
DDRII 1.8A @ VIN = 1.8V
DDRIII 1.5A @ VIN = 1.5V
LPDDRIII 1.2A @ VIN = 1.35V
DDRIV 1.2A @ VIN = 1.2V
集成功率 MOSFET
为 DDR 存储器接口生成终端电压
配合陶瓷输出电容稳定工作
全负载范围内高精度输出
两只电阻即可调整输出电压
外围元件少
关机模式下对 RAM 呈现为高阻输出的挂起状态
电流限制保护
片内过热保护
符合 RoHS 规范
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