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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
LM317 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
LM317DCY ACTIVE 0 to 125 0.43 | 1ku SOT-223 (DCY) | 4 80 | TUBE L3
LM317DCYG3 ACTIVE 0 to 125 0.43 | 1ku SOT-223 (DCY) | 4 80 | TUBE L3
LM317DCYR ACTIVE 0 to 125 0.36 | 1ku SOT-223 (DCY) | 4 2500 | LARGE T&R L3
LM317DCYRG3 ACTIVE 0 to 125 0.36 | 1ku SOT-223 (DCY) | 4 2500 | LARGE T&R L3
LM317KC OBSOLETE 0 to 125 TO-220 (KC) | 3 LM317
LM317KCE3 OBSOLETE 0 to 125 TO-220 (KC) | 3 LM317
LM317KCS ACTIVE 0 to 125 0.36 | 1ku TO-220 (KCS) | 3 50 | TUBE LM317
LM317KCSE3 ACTIVE 0 to 125 0.36 | 1ku TO-220 (KCS) | 3 50 | TUBE LM317
LM317KTER OBSOLETE 0 to 125 (KTE) | 3 LM317
LM317KTTR ACTIVE 0 to 125 0.43 | 1ku DDPAK/TO-263 (KTT) | 3 500 | LARGE T&R LM317
LM317KTTRG3 ACTIVE 0 to 125 0.43 | 1ku DDPAK/TO-263 (KTT) | 3 500 | LARGE T&R LM317
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
  1. LM317 数据资料 dataSheet 下载.PDF
  2. 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
  3. Dual MOSFET Driver (PDF 498 KB)
  4. 全面认识开关型电源中的BUCK-BOOST功率级 (Rev. A) (PDF 2206 KB)
  5. LDO PSRR Measurement Simplified (PDF 140 KB)
  6. LDO Noise Demystified (PDF 782 KB)
  7. 标准线性产品交叉参考 (Rev. D) (PDF 1058 KB)
  8. 模数规格和性能特性术语表 (Rev. A) (PDF 1993 KB)
  9. 所选封装材料的热学和电学性质 (PDF 645 KB)
  10. 高速数据转换 (PDF 1967 KB)