LP2950-50 Fixed 5V Micropower Voltage Regulator with Shutdown
LP2950-50 描述
The LP2950 and LP2951 devices are bipolar, low-dropout voltage regulators that can accommodate a wide input supply-voltage range of up to 30 V. The easy-to-use, 3-pin LP2950 is available in fixed-output voltages of 5 V, 3.3 V, and 3 V. However, the 8-pin LP2951 is able to output either a fixed or adjustable output from the same device. By tying the OUTPUT and SENSE pins together, and the FEEDBACK and VTAP pins together, the LP2951 outputs a fixed 5 V, 3.3 V, or 3 V (depending on the version). Alternatively, by leaving the SENSE and VTAP pins open and connecting FEEDBACK to an external resistor divider, the output can be set to any value between 1.235 V to 30 V.
The 8-pin LP2951 also offers additional functionality that makes it particularly suitable for battery-powered applications. For example, a logic-compatible shutdown feature allows the regulator to be put in standby mode for power savings. In addition, there is a built-in supervisor reset function in which the ERROR output goes low when VOUT drops by 6% of its nominal value for whatever reasons – due to a drop in VIN, current limiting, or thermal shutdown.
The LP2950 and LP2951 are designed to minimize all error contributions to the output voltage. With a tight output tolerance (0.5% at 25°C), a very low output voltage temperature coefficient (20 ppm typical), extremely good line and load regulation (0.3% and 0.4% typical), and remote sensing capability, the parts can be used as either low-power voltage references or 100-mA regulators
|
LP2950-30 |
LP2950-33 |
LP2950-50 |
| Iout(Max)(A) |
|
0.1 |
0.1 |
| Vdo(Typ)(mV) |
|
380 |
380 |
| Iq(Typ)(mA) |
0.075 |
0.075 |
0.075 |
| Vin(Min)(V) |
|
3.75 |
5.45 |
| Vin(Max)(V) |
30 |
30 |
30 |
| Vout(Min)(V) |
3 |
3.3 |
5 |
| Vout(Max)(V) |
3 |
3.3 |
5 |
| Vout Adj(Min)(V) |
1.235 |
1.235 |
1.235 |
| Vout Adj(Max)(V) |
30 |
30 |
30 |
| Accuracy(%) |
|
1.4 |
1.4 |
| Output Capacitor(uF) |
|
2.2 |
1 |
| Output Capacitor Type |
|
Electrolytic |
Electrolytic |
| Fixed Output Options(V) |
3 |
3.3 |
5 |
| Pin/Package |
3TO-92 |
3TO-92 |
3TO-92 |
| Rating |
Catalog |
Catalog |
Catalog |
| Regulated Outputs(#) |
1 |
1 |
1 |
LP2950-50 特性
- Wide Input Range: Up to 30 V
- Rated Output Current of 100 mA
- Low Dropout: 380 mV (Typ) at 100 mA
- Low Quiescent Current: 75 µA (Typ)
- Tight Line Regulation: 0.03% (Typ)
- Tight Load Regulation: 0.04% (Typ)
- High VO Accuracy
- 1.4% at 25°C
- 2% Over Temperature
- Can Be Used as a Regulator or Reference
- Stable With Low ESR (>12 mΩ Capacitors
- Current- and Thermal-Limiting Features
- LP2950 Only (3-Pin Package)
- Fixed-Output Voltages of 5 V, 3.3 V, and 3 V
- LP2951 Only (8-Pin Package)
- Fixed- or Adjustable-Output Voltages: 5 V/ADJ, 3.3 V/ADJ, and 3 V/ADJ
- Low-Voltage Error Signal on Falling Output
- Shutdown Capability
- Remote Sense Capability for Optimal Output Regulation and Accuracy
LP2950-50 芯片订购指南
| 器件 |
状态 |
温度 (oC) |
价格（美元） |
封装 | 引脚 |
封装数量 | 封装载体 |
丝印标记 |
| LP2950-50LPRE3 |
ACTIVE |
0 to 0 |
0.18 | 1ku |
TO-92 (LP) | 3 |
2000 | LARGE T&R |
KY5050 |
LP2950-50 质量与无铅数据
| 器件 |
环保计划* |
铅/焊球涂层 |
MSL 等级/回流焊峰 |
环保信息与无铅 (Pb-free) |
DPPM / MTBF / FIT 率 |
| LP2950-50LPRE3 |
Pb-Free (RoHS) |
CU SN |
N/A for Pkg Type |
LP2950-50LPRE3 |
LP2950-50LPRE3 |
LP2950-50 应用技术支持与电子电路设计开发资源下载
- LP2950-50 数据资料 dataSheet 下载.PDF
- TI 德州仪器LDO低压差线性稳压器驱动器选型与价格参考 . xls
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- LDO Noise Demystified
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- 标准线性产品交叉参考 (Rev. D)
(PDF 1058 KB)
- 模数规格和性能特性术语表 (Rev. A) (PDF 1993 KB)
- 所选封装材料的热学和电学性质 (PDF 645 KB)
- 高速数据转换 (PDF 1967 KB)
