参数资料
| 型号： | NCP5203MNR2G |
| 厂商： | ON Semiconductor |
| 文件页数： | 8/10页 |
| 文件大小： | 0K |
| 描述： | IC CTRLR PWR DDR DUAL 5X6 18-DFN |
| 产品变化通告： | Product Discontinuation 01/Oct/2008 |
| 标准包装： | 2,500 |
| 应用： | 控制器，DDR |
| 输入电压： | 4.5 V ~ 5.5 V |
| 输出数： | 2 |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 18-VFDFN 裸露焊盘 |
| 供应商设备封装： | 18-DFN（5x6） |
| 包装： | 带卷 (TR) |
| 其它名称： | NCP5203MNR2GOS |
NCP5203
VTT Active Terminator in Normal Mode (S0)
The VTT active terminator is a two?quadrant linear
regulator with two internal N?channel power FETs to
provide transient current sink and source capability up to
2.0 A. It is activated in normal mode in S0 when the
VTTEN pin is high and VDDQ is in regulation. When in the
S0 state and VTT is in regulation, signal INREGVTT will
go high to notify the control logic block. The VTT regulator
is powered from VDDQ with the internal FET’s gate drive
power derived from 5VDUAL. The VTT output voltage
can be adjusted by using an external resistor divider
connected to the REFSNS pin. This regulator is stable with
any value of output capacitor greater than 470 m F, and is
insensitive to ESR ranging from 2.0 m W to 400 m W .
VTT Active Terminator in Normal Mode (S3)
VTT output is high?impedance in S3 mode.
VTT Active Terminator Fault Protection
To provide protection for the internal FETs,
bi?directional current limit is implemented, preset at 2.4 A
magnitude. This current limit is also used as constant
VTT Active Terminator Thermal Consideration
The VTT terminator is designed to handle large transient
output currents. If large currents are required for very long
duration, then care should be taken to ensure the maximum
junction temperature is not exceed. The 5x6 QFN?18 has
a thermal resistance of 35 _ C/W (dependent on air flow,
grade of copper, and number of vias). In order to take full
advantage of this thermal capability, the thermal pad
underneath must be soldered directly to a PCB metal
substrate.
Supply Voltages Undervoltage Monitor
The IC continuously monitors 5VDUAL through the
5VDUAL pin. 5VDLGD is set high if 5VDUAL is higher
than its preset threshold (derived from VREF with
hysteresis). The IC will later latch off if 5VDUAL is in S0
providing both VDDQEN and VTTEN remain high.
Thermal Shutdown
If the chip junction temperature exceeds 150 _ C, the
entire IC will shutdown. The IC resumes normal operation
only after 5VDUAL or VDDQEN is cycled.
current source during VTT startup.
http://onsemi.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| NCP5208 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:DDR−I/II Termination Regulator |
| NCP5208/D | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:DDR-I/II Termination Regulator |
| NCP5208_06 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:DDR−I/II Termination Regulator |
| NCP5208DR2 | 功能描述:线性稳压器 - 标准 DDR-I/II Termination RoHS:否 制造商:STMicroelectronics 输出类型: 极性: 输出电压:1.8 V 输出电流:150 mA 负载调节: 最大输入电压:5.5 V 线路调整率: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOT-323-5L |
| NCP5208DR2G | 功能描述:线性稳压器 - 标准 DDR-I/II Termination RoHS:否 制造商:STMicroelectronics 输出类型: 极性: 输出电压:1.8 V 输出电流:150 mA 负载调节: 最大输入电压:5.5 V 线路调整率: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOT-323-5L |
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