- 您现在的位置：买卖IC网 > PDF目录67756 > LM3411A-5.0MWC (NATIONAL SEMICONDUCTOR CORP) 1-OUTPUT THREE TERM VOLTAGE REFERENCE, 5 V, UUC PDF资料下载
参数资料
| 型号： | LM3411A-5.0MWC |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 基准电压源/电流源 |
| 英文描述： | 1-OUTPUT THREE TERM VOLTAGE REFERENCE, 5 V, UUC |
| 封装： | WAFER |
| 文件页数： | 2/16页 |
| 文件大小： | 403K |
| 代理商： | LM3411A-5.0MWC |
Applications Information (Continued)
The circuit in
Figure 8 shows a 3.3V low dropout regulator
using the LM3411-3.3 and several discrete components.
This circuit is capable of excellent performance with both the
dropout voltage and the ground pin current specifications im-
proved over the LM2941/LM3411 circuit.
The standard LM317 three terminal adjustable regulator cir-
cuit can greatly benefit by adding a LM3411. Performance is
increased and features are added. The circuit shown in
Fig-
ure 9 provides much improved line and load regulation,
lower temperature drift, and full remote output voltage sens-
ing on both the high and low side. In addition, a precise cur-
rent limit or constant current feature is simple to add.
Current limit protection in most IC regulators is mainly to pro-
tect the IC from gross over-current conditions which could
otherwise fuse bonding wires or blow IC metalization, there-
fore not much precision is needed for the actual current limit
values. Current limit tolerances can sometimes vary from
±10% to as high as +300% over manufacturing and tem-
perature variations. Often critical circuitry requires a much
tighter control over the amount of current the power supply
can deliver. For example, a power supply may be needed
that can deliver 100% of its design current, but can still limit
the maximum current to 110% to protect critical circuitry from
high current fault conditions.
The circuit in
Figure 9 can provide a current limit accuracy
that is better than ±4%, over all possible variations, in addi-
tion to having excellent line, load and temperature
specifications.
Like the positive regulators, the performance of negative ad-
justable regulators can also be improved by adding the
LM3411. Output voltages of either 3.3V or 5V at currents up
to 1.5A (3A when using a LM333) are possible. Adding two
resistors to the circuit in
Figure 10 adds the precision current
limit feature as shown in
Figure 11. Current limit tolerances
of ±4% over manufacturing and temperature variations are
possible with this circuit.
DS011987-19
FIGURE 7. Precision 5V 1A Low Dropout Regulator
DS011987-20
FIGURE 8. 3.3V 0.5A Low Dropout Regulator
DS011987-21
FIGURE 9. Precision Positive Voltage Regulator with Accurate Current Limit
LM341
1
www.national.com
10
相关PDF资料 |
PDF描述 |
|---|---|
| LM385D-2.5 | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 2.5 V, PDSO8 |
| LM385BLP-2.5 | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 2.5 V, PBCY3 |
| LM385LP-2.5 | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 2.5 V, PBCY3 |
| LM385BD-2.5 | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 2.5 V, PDSO8 |
| LM285LP-2.5 | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 2.5 V, PBCY3 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LM3411AM5-3.3 | 功能描述:基准电压& 基准电流 RoHS:否 制造商:STMicroelectronics 产品:Voltage References 拓扑结构:Shunt References 参考类型:Programmable 输出电压:1.24 V to 18 V 初始准确度:0.25 % 平均温度系数（典型值）:100 PPM / C 串联 VREF - 输入电压（最大值）: 串联 VREF - 输入电压（最小值）: 分流电流（最大值）:60 mA 最大工作温度:+ 125 C 封装 / 箱体:SOT-23-3L 封装:Reel |
| LM3411AM5-3.3/NOPB | 功能描述:基准电压& 基准电流 RoHS:否 制造商:STMicroelectronics 产品:Voltage References 拓扑结构:Shunt References 参考类型:Programmable 输出电压:1.24 V to 18 V 初始准确度:0.25 % 平均温度系数（典型值）:100 PPM / C 串联 VREF - 输入电压（最大值）: 串联 VREF - 输入电压（最小值）: 分流电流（最大值）:60 mA 最大工作温度:+ 125 C 封装 / 箱体:SOT-23-3L 封装:Reel |
| LM3411AM5-5.0 | 功能描述:基准电压& 基准电流 RoHS:否 制造商:STMicroelectronics 产品:Voltage References 拓扑结构:Shunt References 参考类型:Programmable 输出电压:1.24 V to 18 V 初始准确度:0.25 % 平均温度系数（典型值）:100 PPM / C 串联 VREF - 输入电压（最大值）: 串联 VREF - 输入电压（最小值）: 分流电流（最大值）:60 mA 最大工作温度:+ 125 C 封装 / 箱体:SOT-23-3L 封装:Reel |
| LM3411AM5-5.0/NOPB | 功能描述:基准电压& 基准电流 RoHS:否 制造商:STMicroelectronics 产品:Voltage References 拓扑结构:Shunt References 参考类型:Programmable 输出电压:1.24 V to 18 V 初始准确度:0.25 % 平均温度系数（典型值）:100 PPM / C 串联 VREF - 输入电压（最大值）: 串联 VREF - 输入电压（最小值）: 分流电流（最大值）:60 mA 最大工作温度:+ 125 C 封装 / 箱体:SOT-23-3L 封装:Reel |
| LM3411AM5-5.0/NOPB | 制造商:Texas Instruments 功能描述:, Voltage Regulator Type:Fixed Positive |
发布紧急采购，3分钟左右您将得到回复。