LP2951 单路输出 LDO、100mA、固定电压 (3.3V) 宽输入电压范围
LP2951 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
|
LP2951 |
LP2951-30 |
LP2951-33 |
LP2951-50 |
| Iout(Max)(A) |
0.1 |
0.1 |
0.1 |
0.1 |
| Vdo(Typ)(mV) |
380 |
380 |
380 |
0.38 |
| Iq(Typ)(mA) |
0.075 |
0.075 |
0.075 |
0.075 |
| Vin(Min)(V) |
1.68 |
3.6 |
3.9 |
5.6 |
| Vin(Max)(V) |
30 |
30 |
30 |
30 |
| Vout(Min)(V) |
1.235 |
3 |
3.3 |
4.9 |
| Vout(Max)(V) |
30 |
3 |
3.3 |
5.1 |
| Vout Adj(Min)(V) |
1.235 |
1.235 |
1.235 |
1.235 |
| Vout Adj(Max)(V) |
30 |
30 |
30 |
30 |
| Accuracy(%) |
1.4 |
1.4 |
1.4 |
1.4 |
| Output Capacitor(uF) |
2.2 |
2.2 |
2.2 |
2.2 |
| Output Capacitor Type |
Electrolytic |
Electrolytic |
Electrolytic |
Electrolytic |
| Fixed Output Options(V) |
3, 3.3, 5 |
3 |
3.3 |
|
| Adj Output Options(V) |
|
1.235 to 30 |
1.235 to 30 |
|
| Pin/Package |
8SOIC |
8SOIC, 8SON |
8SOIC, 8SON |
8SOIC, 8SON |
| Rating |
Catalog |
Catalog |
Catalog |
Catalog |
| Regulated Outputs(#) |
1 |
1 |
1 |
LP2951 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
LP2951 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 |
| LP2951D |
ACTIVE |
-40 to 125 |
0.33 | 1ku |
SOIC (D) | 8 |
75 | TUBE |
LP2951 |
| LP2951DG4 |
ACTIVE |
-40 to 125 |
0.33 | 1ku |
SOIC (D) | 8 |
75 | TUBE |
LP2951 |
| LP2951DR |
ACTIVE |
-40 to 125 |
0.27 | 1ku |
SOIC (D) | 8 |
2500 | LARGE T&R |
LP2951 |
| LP2951DRG4 |
ACTIVE |
-40 to 125 |
0.27 | 1ku |
SOIC (D) | 8 |
2500 | LARGE T&R |
LP2951 |
LP2951 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 |
| LP2951D |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-1-260C-UNLIM |
LP2951D |
LP2951D |
| LP2951DG4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-1-260C-UNLIM |
LP2951DG4 |
LP2951DG4 |
| LP2951DR |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-1-260C-UNLIM |
LP2951DR |
LP2951DR |
| LP2951DRG4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-1-260C-UNLIM |
LP2951DRG4 |
LP2951DRG4 |
LP2951 应用技术支持与电子电路设计开发资源下载
- LP2951 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
- Dual MOSFET Driver
(PDF 498 KB)
- 全面认识开关型电源中的BUCK-BOOST功率级 (Rev. A)
(PDF 2206 KB)
- LDO PSRR Measurement Simplified
(PDF 140 KB)
- LDO Noise Demystified
(PDF 782 KB)
- 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)
