CXTP65154是给DDR存储器总线终端供电的高性能线性调节器。同以前开关电源解决方案相比，它显著地降低了元件数量、板空间和系统成本。CXTP65154包含一个高速运算放大器以提供优异的负载瞬态响应。它有独立的电源引脚（VCNTL）以得到更好的输出驱动能力。该调制器能吸收和提供达2A的电流，输出终端电压通过外接两个分压电阻紧密地跟踪1/2 VDDQ。CXTP65154与终端电阻串连使用可以为高速传输线的动态终端方案提供优良的电压源，通常这能在高速存储器总线中看到
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产品概述 返回TOP
CXTP65154是给DDR存储器总线终端供电的高性能线性调节器。同以前开关电源解决方案相比，它显著地降低了元件数量、板空间和系统成本。CXTP65154包含一个高速运算放大器以提供优异的负载瞬态响应。它有独立的电源引脚（VCNTL）以得到更好的输出驱动能力。该调制器能吸收和提供达2A的电流，输出终端电压通过外接两个分压电阻紧密地跟踪1/2 VDDQ。CXTP65154与终端电阻串连使用可以为高速传输线的动态终端方案提供优良的电压源，通常这能在高速存储器总线中看到。The CXTP65154 is a high performance linear regulator designed to provide power for termination of a DDR memory bus. It significantly reduces parts count, board space and overall system cost over previous switching solutions. The CXTP65154 contains a high-speed operational amplifier to provide excellent response to load transients. It also has an independent power source pin (VCNTL) for achieving better output driving capability. The regulator can both sink and source up to 2A current. The output termination voltage can be tightly regulated to track 1/2 VDDQ by two external voltage divider resistors. The CXTP65154, used in conjunction with series termination resistors, provides an excellent voltage source for active termination schemes of high speed transmission lines as those seen in high speed memory buses. A typical DDR memory system is seen in Figure 1.
产品特点 返回TOP
• 兼容DDR-I (1.25VTT)和DDR-II (0.9VTT) SDRAM系统
• 1.1mA低静态电流
• 快速瞬态响应
• 能提供/吸收2A电流
• 通过两个外部电阻可调节输出电压
• 电流限制保护
• 过温保护
• 全负载范围内高精度的输出电压
• 很少的外部元件
• 带散热垫的SOP-8封装
• 符合RoHS规范及Pb-Free
z Compatible with DDR-I (1.25VTT) or DDR-II (0.9VTT) SDRAM Systems.
z Low Quiescent Current (1.1mA)
z Fast Transient Response Time
z Capable of Sourcing and Sinking 2A
z Adjustable VOUT by Two External Resistors
z Current Limiting Protection
z Over-Temperature Protection
z High Accuracy Output Voltage at Full-Load
z Low External Component Count
z Available in SOP-8 Exposed Pad Package
z RoHS Compliant and 100% Lead (Pb)-Free
应用范围 返回TOP
• DDR SDRAM终端电压
z DDR SDRAM Termination Voltage
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产品封装图 返回TOP
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DDR终端稳压器 |
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Part Number |
remark |
Iout (A) |
Vin (V) |
Vout (V) |
Output Voltage Accuracy (mV) |
Shutdown |
Package |
|
1.5A DDR Termination Regulator |
± 1.5 |
1.8 ~ 5.5 |
0.9~1.25 |
± 20 |
Yes |
SOP-8 (EP) |
|
|
2A Sink/Source Bus Termination Regulator |
± 2 |
1.8 ~ 5.5 |
0.9~1.25 |
± 20 |
Yes |
SOP-8 (EP) |
|
|
Sink/Source DDR Termination Regulator |
± 2 |
2.375 ~ 5.5 |
0.5~1.8 |
± 25 |
Yes |
TDFN-10,SOP-8 |
|
|
DDR Termination Regulator |
± 1.5 |
1.5~3.3 |
0.75~0.9 |
±20 |
Yes |
SOP-8(EP) |
|
