产品概述

经济高效的1.8A宿/源总线终端调节器

总体描述

RT9045是一款简单、经济高效的高速线性稳压器，设计用于在双数据速率(DDR)存储器系统中产生端接电压，以满足器件要求。调节器能够主动吸收或提供高达1.8A的电流，同时将输出电压调节至20mV以内。输出端接电压可以通过两个外部分压电阻严格调节以跟踪VDDQ/ 2，或者通过外部强制REFEN引脚电压来编程所需的输出电压。

特征

非常适合DDR VTT应用 吸电流和源电流: 1.8A吸/源@ VIN = 1.8V 车辆识别号= 1.5V时的1.5A吸/源 VIN = 1.35V伏时LPDDRIII 1.2A安吸/源 ` DDRIV 1.2A吸/源@ VIN = 1.2V 集成功率MOSFETs 为DDR存储器接口产生端接电压

输出陶瓷电容稳定

满载时的高精度输出电压

两个外部电阻的输出调节

外部元件数量少

具有高阻抗输出的暂停至随机存取存储器(STR)功能关闭

限流保护

片内热保护

通过无铅认证

应用程序

台式电脑、笔记本电脑和工作站

显卡内存终端

机顶盒、数字电视、打印机

嵌入式系统

主动终端总线

内存系统

Product overview

Cost-Effective, 1.8A Sink/Source Bus Termination Regulator

General Description

The RT9045 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 devices requirements. The regulator is capable of actively sinking or sourcing up to 1.8A while regulating an output voltage to within 20mV. The output termination voltage can be tightly regulated to track VDDQ/ 2 by two external voltage divider resistors or the desired output voltage can be programmed by externally forcing the REFEN pin voltage.

Features

Ideal for DDR VTT Applications

Sink and Source Current :

DDRII 1.8A Sink/Source @ VIN = 1.8V

DDRIII 1.5A Sink/Source @ VIN = 1.5V

LPDDRIII 1.2A Sink/Source @ VIN = 1.35V

`DDRIV 1.2A Sink/Source @ VIN = 1.2V

Integrated Power MOSFETs

Generate Termination Voltage for DDR Memory Interfaces

Stable with Output Ceramic Capacitor

High Accuracy Output Voltage at Full-Load

Output Adjustment by Two External Resistors

Low External Component Count

Shutdown for Suspend to RAM (STR) Functionality with High Impedance Output

Current Limiting Protection

On-Chip Thermal Protection

RoHS Compliant

Applications

Desktop PCs, Notebooks, and Workstations

Graphics Card Memory Termination

Set Top Boxes, Digital TVs, Printers

Embedded Systems

Active Termination Buses

DDR Memory Systems