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.
기술 자료
| 유형 | 직함 | 날짜 | ||
|---|---|---|---|---|
| * | Data sheet | LM3691 High-Accuracy, Miniature 1-A Step-Down DC-DC Converter for Portable Applications datasheet (Rev. J) | PDF | HTML | 2015/12/17 |
| Application note | Semiconductor and IC Package Thermal Metrics (Rev. D) | PDF | HTML | 2024/03/25 | |
| Selection guide | Power Management Guide 2018 (Rev. R) | 2018/06/25 | ||
| EVM User's guide | AN-1772 LM3691 Evaluation Board (Rev. B) | 2013/04/30 | ||
| Application note | AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) | 2013/04/24 | ||
| Application note | AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A) | 2013/04/23 | ||
| Application note | AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) | 2013/04/23 | ||
| Application note | AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) | 2013/04/23 | ||
| More literature | SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations | 2005/07/12 | ||
| Application note | AN-643 EMI/RFI Board Design (Rev. B) | 2004/05/03 |
설계 및 개발
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LM3691TL-1.8EV — LM3691TL-1.8 평가 보드
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 Average Model Package (Rev. A)
LM3691 Unencrypted PSpice Transient Model Package (Rev. C)
| 패키지 | 핀 | CAD 기호, 풋프린트 및 3D 모델 |
|---|---|---|
| DSBGA (YZR) | 6 | Ultra Librarian |
주문 및 품질
- RoHS
- REACH
- 디바이스 마킹
- 납 마감/볼 재질
- MSL 등급/피크 리플로우
- MTBF/FIT 예측
- 물질 성분
- 인증 요약
- 지속적인 신뢰성 모니터링
- 팹 위치
- 조립 위치