LM109
- Specified to be compatible, worst case, with TTL and DTL
- Output current in excess of 1A
- Internal thermal overload protection
- No external components required
The LM109 series are complete 5V regulators fabricated on a single silicon chip. They are designed for local regulation on digital logic cards, eliminating the distribution problems association with single-point regulation. The devices are available in two standard transistor packages. In the solid-kovar TO-5 header, it can deliver output currents in excess of 200 mA, if adequate heat sinking is provided. With the TO-3 power package, the available output current is greater than 1A.
The regulators are essentially blowout proof. Current limiting is included to limit the peak output current to a safe value. In addition, thermal shutdown is provided to keep the IC from overheating. If internal dissipation becomes too great, the regulator will shut down to prevent excessive heating.
Considerable effort was expended to make these devices easy to use and to minimize the number of external components. It is not necessary to bypass the output, although this does improve transient response somewhat. Input bypassing is needed, however, if the regulator is located very far from the filter capacitor of the power supply. Stability is also achieved by methods that provide very good rejection of load or line transients as are usually seen with TTL logic.
Although designed primarily as a fixed-voltage regulator, the output of the LM109 series can be set to voltages above 5V, as shown. It is also possible to use the circuits as the control element in precision regulators, taking advantage of the good current-handling capability and the thermal overload protection.
技术文档
类型 | 标题 | 下载最新的英语版本 | 日期 | |||
---|---|---|---|---|---|---|
* | 数据表 | LM109/LM309 5-Volt Regulator 数据表 (Rev. A) | 2004年 5月 3日 | |||
应用手册 | A Topical Index of TI LDO Application Notes (Rev. F) | 2019年 6月 27日 | ||||
应用手册 | AN-103 LM340 Series Three Terminal Positive Regulators (Rev. A) | 2013年 5月 6日 | ||||
应用手册 | AN-1148 Linear Regulators: Theory of Operation and Compensation (Rev. B) | 2013年 5月 6日 | ||||
应用手册 | AN-42 IC Provides On-Card Regulation for Logic Circuits (Rev. B) | 2013年 5月 6日 | ||||
应用手册 | Method For Cal Output Voltage Tolerances in Adj Regs (Rev. A) | 2013年 5月 5日 | ||||
应用手册 | Super Matched Bipolar Transistor Pair Sets New Standards for Drift and Noise (Rev. B) | 2013年 5月 5日 | ||||
应用手册 | Packaging Limits Range of Linear Regulators | 2010年 5月 8日 | ||||
应用手册 | Digital Designer's Guide to Linear Voltage Regulators & Thermal Mgmt (LDO) (Rev. A) | 2008年 6月 4日 | ||||
应用手册 | High Stability Regulators | 2002年 10月 3日 | ||||
应用手册 | Understanding the Terms and Definitions of LDO Voltage Regulators | 1999年 10月 21日 |
设计和开发
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封装 | 引脚 | CAD 符号、封装和 3D 模型 |
---|---|---|
TO-CAN (NDS) | 2 | Ultra Librarian |
TO-CAN (NDT) | 3 | Ultra Librarian |
订购和质量
- 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
- 制造厂地点
- 封装厂地点