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HGSEMI LM317S/TR LM317S
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- HGSEMI LM317S / TR
- Type
- HGSEMI
- Minimum package
- 500 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- 40V@(1.5A)
- Electronic Component
- HGSEMI
- Electronic Component
- LM317S/TR
- Electronic Component
- 1
- Package
- TO-263-3
- Electronic Component
- Linear Regulator(LDO)
- Electronic Component
- 2.288g
- Electronic Component
- 1
- Electronic Component
- BM0264801310
- Operating Temperature
- 0℃~+70℃@(Ta)
- Operating Voltage
- 40V
- Output
- Electronic Component
- Output Voltage
- 1.2V~37V
- Output Current
- 1.5A
- Output Type
- Electronic Component
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
LM317S/TR 产品概述
一、产品简介
LM317S/TR 是 HGSEMI（华冠）推出的一款可调式三端正电压稳压器，输出极性为正极。器件在输出电压约 1.2V（典型参考电压 1.25V）至 37V 范围内可调，最大输出电流可达 1.5A。内部集成限流、热关断与安全工作区补偿，能在多数异常工况下保护器件和外部电路不致损坏，使用简单且可靠性高。常见封装为 TO-263-3（D2PAK），适合表面贴装应用。
二、主要性能参数
- 输出电压：可调 1.2V ~ 37V（典型参考电压约 1.25V）
- 最大输出电流：1.5A
- 最大输入-输出电压差：40V（在 1.5A 条件下）
- 电源纹波抑制比（PSRR）：65dB @ 120Hz（典型条件）
- 功能保护：热关断、过流限制、短路保护（安全工作区补偿）
- 工作环境温度：Ta 0℃ ~ +70℃（环境温度范围）
- 输出类型：可调输出；单通道
三、外部电路与使用建议
- 输出电压设定公式：VOUT ≈ VREF × (1 + R2/R1) + IADJ×R2（其中 VREF 约 1.25V，IADJ 很小通常可忽略）。为获得稳定表现常用 R1 = 240Ω，R2 按目标电压计算。
- 建议输入/输出去耦：输入侧使用 0.1µF 陶瓷并联 10µF47µF 电解电容；输出侧配备 1µF25µF 电解或钽电容以保证稳定性。
- 提高 PSRR：在 ADJ 引脚与地之间并联一个 10µF 左右的电容（旁路电容）可显著提升纹波抑制与输出噪声性能。
- 恒流应用：将稳压器工作于恒流模式时，可利用 VREF 与外部电阻实现 IOUT ≈ VREF / RSET 的限流源设计。
四、散热与保护考虑
LM317 在工作时的功耗主要来自 Vin-Vout 与输出电流的乘积（Pd = (Vin - Vout) × Iout）。当电压差或输出电流较大时需加强散热：建议配合 PCB 大面积铜箔、热过孔或外接散热片使用。内部热关断可防止过热损坏，但长期稳定工作需保证结温在安全范围内。器件集成的限流与短路保护能在短时间冲击下保护电源与负载，但并非替代适当的热设计与熔断器。
五、典型应用场景与封装信息
- 典型应用：可调稳压电源、线性后级稳压、实验室电源、低噪声模拟电源、通信设备、传感器供电、简单电池充电与限流电路等。
- 封装与订购：常用封装为 TO-263-3（SMD / D2PAK），适配工业与消费类电子的表面贴装工艺。订购时请参考 HGSEMI 型号 LM317S/TR 并核对封装与热特性需求。
总结：LM317S/TR 以其调节范围宽、保护功能齐全、使用简便而广泛应用于需要线性可调电压与低噪声特性的场合。在设计时注意输入输出去耦、ADJ 旁路与热管理，能获得稳定可靠的性能。
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