產品概述
經濟高效的1.8A宿/源總線終端調節(jié)器
總體描述
RT9045是一款簡單、經濟高效的高速線性穩(wěn)壓器，設計用于在雙數(shù)據(jù)速率(DDR)存儲器系統(tǒng)中產生端接電壓，以滿足器件要求。調節(jié)器能夠主動吸收或提供高達1.8A的電流，同時將輸出電壓調節(jié)至20mV以內。輸出端接電壓可以通過兩個外部分壓電阻嚴格調節(jié)以跟蹤VDDQ/ 2，或者通過外部強制REFEN引腳電壓來編程所需的輸出電壓。
特征
非常適合DDR VTT應用 吸電流和源電流: 1.8A吸/源@ VIN = 1.8V 車輛識別號= 1.5V時的1.5A吸/源 VIN = 1.35V伏時LPDDRIII 1.2A安吸/源 ` DDRIV 1.2A吸/源@ VIN = 1.2V 集成功率MOSFETs 為DDR存儲器接口產生端接電壓
輸出陶瓷電容穩(wěn)定
滿載時的高精度輸出電壓
兩個外部電阻的輸出調節(jié)
外部元件數(shù)量少
具有高阻抗輸出的暫停至隨機存取存儲器(STR)功能關閉
限流保護
片內熱保護
通過無鉛認證
應用程序
臺式電腦、筆記本電腦和工作站
顯卡內存終端
機頂盒、數(shù)字電視、打印機
嵌入式系統(tǒng)
主動終端總線
內存系統(tǒng)
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
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