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Slkor LM2596S-12 LM2596S
Configuration
1 options
Configuration
Date code within 2 years
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- Slkor LM2596S-12
- Type
- SLKOR
- Minimum package
- 500 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- SLKOR
- Electronic Component
- LM2596S-12
- Electronic Component
- 1
- Package
- TO-263-5
- Electronic Component
- DC-DC Power Supply IC
- Electronic Component
- 1.91g
- Electronic Component
- 1
- Features
- Electronic Component
- Type
- Electronic Component
- Synchronous
- Electronic Component
- Electronic Component
- BM0226546164
- Operating Temperature
- 40℃~+125℃@(TJ)
- Operating Voltage
- 5V~30V
- Switching Frequency
- 127kHz~173kHz
- Electronic Component
- Electronic Component
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
LM2596S-12 产品概述
一、概述
LM2596S-12 是一款降压型开关稳压器（Buck），针对 12V 固定输出电源应用而优化。器件集成了内置开关管，支持最大输出电流 3A，输入电压范围宽（工作电压 5V～30V），并能在工业级温度范围内可靠工作（工作结温 -40℃～+125℃）。封装为 TO-263-5，便于散热与 PCB 装配。输出电压额定为 12V（容差范围 11.52V～12.48V），静态电流约 2mA，开关频率在 127kHz～173kHz 区间，属于中等频率设计，兼顾效率与外部元件体积。
二、主要特性
- 降压型拓扑，固定 12V 输出（11.52V～12.48V）
- 输入电压：5V～30V（注意实际启动与稳压性能）
- 最大输出电流：3A（需配合适当电感与散热措施）
- 开关频率：127kHz～173kHz，利于选择电感与滤波电容
- 静态电流（Iq）：约 2mA，低空载损耗
- 内置开关管，简化外部功率器件设计
- 同步整流：否，需外接低压降肖特基整流二极管
- 单输出通道，TO-263-5 封装，便于散热与大电流焊接
- 工作温度：-40℃～+125℃（以结温为准）
三、典型应用
- 工业控制电源、嵌入式系统供电
- 通信设备与仪表的 12V 辅助电源
- 汽车电子（需注意车辆瞬变与浪涌保护）
- 需要高转换效率且外形尺寸受限的场合
四、设计要点与注意事项
- 非同步整流设计：必须选用适配的肖特基二极管（额定电流 ≥3A，低正向压降）以降低整流损耗与发热。
- 电感选择：根据峰值电流与纹波电流选择合适电感，保持连续导通（或按设计需要允许断续导通）。注意电感饱和电流要高于最大负载峰值。
- 输入/输出电容：为保证稳定与低纹波，输入侧需放置低 ESR 的陶瓷或钽电容，输出侧需组合低 ESR 电解或固态电容与陶瓷旁路电容。
- EMI 与滤波：开关频率较低，输出滤波器体积适中，但仍需考虑开关噪声与 PCB 布局，增加必要的共模/差模滤波或 RC 抑制网络以满足 EMI 要求。
- 热管理：TO-263-5 封装需良好散热路径，安排足够铜箔面积与散热孔，必要时采用热沉或加厚铜层。长时间 3A 输出下须验证结温。
- PCB 布局：缩短高电流环路（开关管—电感—肖特基—电容）路径，输入电容靠近器件引脚，减小回流环路面积以降低 EMI 与寄生感抗。
五、可靠性与保护建议
建议在系统中加入输入过压、反接保护、输出过流/短路保护及热关断策略（若器件自带内部保护可作为冗余），并在关键场合加装浪涌抑制（TVS）与滤波网络以提升系统稳健性。
总结：LM2596S-12 以其内置开关、大电流能力和宽输入范围，适合多种 12V 降压场合。合理的外部器件选择、严谨的 PCB 布局和充分的散热设计是保证长期稳定运行的关键。
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