LM317 3 引脚 1.5A 可调节负电压稳压器
LM317 描述
The LM317 is an adjustable three-terminal positive-voltage regulator capable of supplying more than 1.5 A over an output-voltage range of 1.25 V to 37 V. It is exceptionally easy to use and requires only two external resistors to set the output voltage. Furthermore, both line and load regulation are better than standard fixed regulators.
In addition to having higher performance than fixed regulators, this device includes on-chip current limiting, thermal overload protection, and safe operating-area protection. All overload protection remains fully functional, even if the ADJUST terminal is disconnected.
The LM317 is versatile in its applications, including uses in programmable output regulation and local on-card regulation. Or, by connecting a fixed resistor between the ADJUST and OUTPUT terminals, the LM317 can function as a precision current regulator. An optional output capacitor can be added to improve transient response. The ADJUST terminal can be bypassed to achieve very high ripple-rejection ratios, which are difficult to achieve with standard three-terminal regulators.
|
LM317 |
LM317L |
LM317M |
| Vout(Min)(V) |
1.25 |
1.2 |
1.25 |
| Vout(Max)(V) |
37 |
32 |
37 |
| Iout(Max)(A) |
1.5 |
0.1 |
0.5 |
| Vdo(Max)(V) |
3 |
2.5 |
3 |
| Vin(Min)(V) |
4.2 |
3.7 |
4.2 |
| Vin(Max)(V) |
40 |
38 |
40 |
| Pin/Package |
2PFM, 3DDPAK/TO-263, 3TO-220, 4SOT-223 |
3SOT-89, 3TO-92, 8SOIC, 8TSSOP |
3PFM, 4SOT-223 |
| Approx. Price (US$) |
0.36 | 1ku |
0.14 | 1ku |
0.40 | 1ku |
LM317 特性
- Output Voltage Range Adjustable From 1.25 V to 37 V
- Output Current Greater Than 1.5 A
- Internal Short-Circuit Current Limiting
- Thermal Overload Protection
- Output Safe-Area Compensation
LM317 芯片订购指南
LM317 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 |
| LM317DCY |
Green (RoHS & no Sb/Br) |
CU SN |
Level-2-260C-1 YEAR |
LM317DCY |
LM317DCY |
| LM317DCYG3 |
Green (RoHS & no Sb/Br) |
CU SN |
Level-2-260C-1 YEAR |
LM317DCYG3 |
LM317DCYG3 |
| LM317DCYR |
Green (RoHS & no Sb/Br) |
CU SN |
Level-2-260C-1 YEAR |
LM317DCYR |
LM317DCYR |
| LM317DCYRG3 |
Green (RoHS & no Sb/Br) |
CU SN |
Level-2-260C-1 YEAR |
LM317DCYRG3 |
LM317DCYRG3 |
| LM317KCS |
Pb-Free (RoHS) |
CU SN |
N/A for Pkg Type |
LM317KCS |
LM317KCS |
| LM317KCSE3 |
Pb-Free (RoHS) |
CU SN |
N/A for Pkg Type |
LM317KCSE3 |
LM317KCSE3 |
| LM317KTTR |
Green (RoHS & no Sb/Br) |
CU SN |
Level-3-245C-168 HR |
LM317KTTR |
LM317KTTR |
| LM317KTTRG3 |
Green (RoHS & no Sb/Br) |
CU SN |
Level-3-245C-168 HR |
LM317KTTRG3 |
LM317KTTRG3 |
LM317 应用技术支持与电子电路设计开发资源下载
- LM317 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
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- 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)
