LM3691
- Input Voltage: 2.3 V to 5.5 V
- Output Voltage: 0.75 V to 3.3 V
- ±1% DC Output Voltage Precision
- 4-MHz Switching Frequency
- 64-μA (typical) Quiescent Current in ECO Mode
- 1-A Maximum Load Capability
- Automatic ECO/PWM Mode Switching
- MODE Pin to Select ECO/Forced PWM Mode
- Current Overload and Thermal Shutdown Protections
- Only Three Tiny Surface-Mount External Components Required (Solution Size Less Than 15 mm2)
The LM3691 step-down DC-DC converter is optimized for powering ultra-low-voltage circuits from a single Li-Ion cell or 3 cell NiMH/NiCd batteries. It provides up to 1-A load current over an input voltage range from 2.3 V to 5.5 V. There are several different fixed voltage output options available.
The LM3691 has a mode-control pin that allows the user to select Forced PWM mode or ECO mode that changes modes between gated PWM mode and PWM automatically, depending on the load. In ECO mode, the device offers superior efficiency and very low IQ under light load conditions. ECO mode extends the battery life through reduction of the quiescent current during light load conditions and system standby.
The LM3691 is available in a 6-pin DSBGA package. Only three external surface-mount
components, a
1-μH inductor, a 4.7-μF input capacitor, and a 4.7-μF output capacitor, are required.
技术文档
| 顶层文档 | 类型 | 标题 | 格式选项 | 下载最新的英语版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 数据表 | LM3691 High-Accuracy, Miniature 1-A Step-Down DC-DC Converter for Portable Applications 数据表 (Rev. J) | PDF | HTML | 2015-12-17 | ||
| 应用手册 | 半导体和 IC 封装热指标 (Rev. D) | PDF | HTML | 英语版 (Rev.D) | PDF | HTML | 2024-4-24 | |
| 选择指南 | 电源管理指南 2018 | 2018-7-31 | ||||
| 应用手册 | AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) | 2013-4-24 | ||||
| 应用手册 | AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) | 2013-4-23 | ||||
| 应用手册 | AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A) | 2013-4-23 | ||||
| 应用手册 | AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) | 2013-4-23 | ||||
| 更多文献资料 | SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations | 2005-7-12 | ||||
| 应用手册 | AN-643 EMI/RFI Board Design (Rev. B) | 2004-5-3 |
设计与开发
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LM3691TL-1.8EV — LM3691TL-1.8 评估板
The LM3691 step-down DC-DC converter is optimized for powering ultra-low voltage circuits from a single Li-Ion cell or 3 cell NiMH/NiCd batteries. It provides up to 1A load current, over an input voltage range from 2.3V to 5.5V. There are several different fixed voltage output options available.
The (...)
| 封装 | 引脚 | CAD 符号、封装和 3D 模型 |
|---|---|---|
| DSBGA (YZR) | 6 | Ultra Librarian |
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