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.
技術文件
類型 | 標題 | 日期 | ||
---|---|---|---|---|
* | Data sheet | LM3691 High-Accuracy, Miniature 1-A Step-Down DC-DC Converter for Portable Applications datasheet (Rev. J) | PDF | HTML | 2015年 12月 17日 |
Application note | Semiconductor and IC Package Thermal Metrics (Rev. D) | PDF | HTML | 2024年 3月 25日 | |
Selection guide | Power Management Guide 2018 (Rev. R) | 2018年 6月 25日 | ||
EVM User's guide | AN-1772 LM3691 Evaluation Board (Rev. B) | 2013年 4月 30日 | ||
Application note | AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) | 2013年 4月 24日 | ||
Application note | AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A) | 2013年 4月 23日 | ||
Application note | AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) | 2013年 4月 23日 | ||
Application note | AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) | 2013年 4月 23日 | ||
More literature | SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations | 2005年 7月 12日 | ||
Application note | AN-643 EMI/RFI Board Design (Rev. B) | 2004年 5月 3日 |
設計與開發
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LM3691TL-1.8EV — LM3691TL-1.8 評估板
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 (...)
LM3691 Unencrypted PSpice Transient Model Package (Rev. C)
封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
---|---|---|
DSBGA (YZR) | 6 | Ultra Librarian |
訂購與品質
- RoHS
- REACH
- 產品標記
- 鉛塗層/球物料
- MSL 等級/回焊峰值
- MTBF/FIT 估算值
- 材料內容
- 認證摘要
- 進行中持續性的可靠性監測
- 晶圓廠位置
- 組裝地點