LM3940
- Input Voltage Range: 4.5 V to 5.5 V
- Output Voltage Specified over Temperature
- Excellent Load Regulation
- Specified 1-A Output Current
- Requires only One External Component
- Built-in Protection against Excess Temperature
- Short-Circuit Protected
The LM3940 is a 1-A low-dropout regulator designed to provide 3.3 V from a 5-V supply.
The LM3940 is ideally suited for systems which contain both 5-V and 3.3-V logic, with prime power provided from a 5-V bus.
Because the LM3940 is a true low dropout regulator, it can hold its 3.3-V output in regulation with input voltages as low as 4.5 V.
The TO-220 package of the LM3940 means that in most applications the full 1 A of load current can be delivered without using an additional heatsink.
The surface mount DDPAK/TO-263 package uses minimum board space, and gives excellent power dissipation capability when soldered to a copper plane on the PC board.
技术文档
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查看全部 2 类型 | 标题 | 下载最新的英语版本 | 日期 | |||
---|---|---|---|---|---|---|
* | 数据表 | LM3940 1-A Low-Dropout Regulator for 5-V to 3.3-V Conversion 数据表 (Rev. G) | PDF | HTML | 2015年 2月 16日 | ||
应用手册 | AN-1061 Power Conversion in Line-Powered Equipment (Rev. B) | 2013年 4月 23日 |
设计和开发
如需其他信息或资源,请点击以下任一标题进入详情页面查看(如有)。
封装 | 引脚 | CAD 符号、封装和 3D 模型 |
---|---|---|
SOT-223 (DCY) | 4 | Ultra Librarian |
TO-220 (NDE) | 3 | Ultra Librarian |
TO-263 (KTT) | 3 | Ultra Librarian |
订购和质量
包含信息:
- RoHS
- REACH
- 器件标识
- 引脚镀层/焊球材料
- MSL 等级/回流焊峰值温度
- MTBF/时基故障估算
- 材料成分
- 鉴定摘要
- 持续可靠性监测
包含信息:
- 制造厂地点
- 封装厂地点
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