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Hottech 78L12
Configuration
1 options
Configuration
Date code within 2 years
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- Hottech 78L12
- Type
- HOTTECH
- Minimum package
- 1000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- 1.7V
- Electronic Component
- HOTTECH
- Electronic Component
- 70uVrms
- Electronic Component
- 78L12
- Electronic Component
- 1
- Package
- SOT-89
- Electronic Component
- Linear Regulator(LDO)
- Electronic Component
- 0.14g
- Electronic Component
- 1
- Electronic Component
- BM0229946197
- Operating Temperature
- 25℃~+125℃
- Operating Voltage
- 35V
- Output
- Electronic Component
- Output Voltage
- 12V
- Output Current
- 100mA
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
78L12（Hottech 合科泰）产品概述
一、型号概述
78L12 为 Hottech（合科泰）系列固定正电压线性稳压器，输出 12V、单路输出、最大输出电流 100mA，工作电压上限 35V，工作温度范围 -25℃～+125℃，封装采用 SOT-89。器件定位于小功率、对噪声与纹波有一定要求的电源输出场合，兼顾体积与散热性能。
二、主要性能参数
- 输出电压：12V（固定）
- 输出电流：最大 100mA
- 压差（最小保持差）：1.7V（因此保证稳压时输入电压至少 ≈13.7V）
- 静态工作电流 Iq：6.5mA
- 噪声：70µVrms（典型值）
- 电源纹波抑制比 PSRR：42dB @ 120Hz（约 126 倍衰减）
- 工作温度：-25℃～+125℃
- 封装：SOT-89，单输出，正极性
三、典型应用场景
适合工业控制模块、传感器电源、低速模拟电路、小型通信设备和便携式仪器等对12V电源有稳定性与低噪声要求且用电量不大的场合。由于静态电流偏大，不建议用于严格低功耗待机场景。
四、封装与热管理提示
SOT-89 体积小但散热能力有限。稳压器的功率耗散 Pd ≈ (Vin - 12V) × Iout + Vin × Iq（近似），例如 Vin=24V、Iout=100mA 时，Pd 约 1.35W，需在 PCB 上留足铜箔、加大散热面积或采用散热垫以防过热并进入热保护。设计时务必计算最坏工况下结温并选取合适的散热方案。
五、设计与使用建议
- 输入电压裕量：为维持规定输出，输入电压应高于 12V + 1.7V（建议预留余量以覆盖纹波与瞬变）。
- 去耦电容：靠近引脚放置一定值的输入去耦（如 0.1µF 陶瓷）和输出电容（推荐并联陶瓷与电解/钽电容以改善瞬态响应，输出侧常配 1µF–10µF 视具体稳定性要求而定）。
- 布局要点：输入/地/输出走线短且粗，接地回路集中，输出电容靠近输出引脚放置以保证稳定性与瞬态性能。
- 噪声与纹波控制：器件本身噪声低、120Hz PSRR 良好，结合输出滤波可满足多数模拟与音频前端需求。
- 可靠性注意：工作温度范围宽，适合工业环境，但应避免长时间在高结温下工作以延长寿命。
六、总结
78L12（Hottech）在 12V、100mA 级别提供了结构紧凑、噪声低、纹波抑制良好的线性稳压解决方案，适合对稳定性和电源品质有要求的小功率应用。注意输入电压裕量与散热设计，可充分发挥其性能。
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