LM2651
- Ultrahigh Efficiency up to 97%
- High-Efficiency Over a 1.5-A to 1.5-mA Load
Range - 4-V to 14-V Input Voltage Range
- 1.8-V, 2.5-V, 3.3-V, or ADJ Output Voltage
- Internal MOSFET Switch With Low RDS(on) of
75 mΩ - 300-kHz Fixed Frequency Internal Oscillator
- 7-µA Shutdown Current
- Patented Current Sensing for Current Mode
Control - Input Undervoltage Lockout
- Adjustable Soft-Start
- Current Limit and Thermal Shutdown
- 16-Pin TSSOP Package
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The LM2651 switching regulator provides high-efficiency power conversion over a 100:1 load range (1.5 A to 15 mA). This feature makes the LM2651 an ideal fit in battery-powered applications that demand long battery life in both run and standby modes.
Synchronous rectification is used to achieve up to 97% efficiency. At light loads, the LM2651 enters a low power hysteretic or sleep mode to maintain high efficiency. In many applications, the efficiency still exceeds 80% at 15-mA load. A shutdown pin is available to disable the LM2651 and reduce the supply current to less than 10 µA.
The LM2651 contains a patented current sensing circuitry for current mode control. This feature eliminates the external current sensing resistor required by other current-mode DC-DC converters.
The LM2651 has a 300-kHz fixed frequency internal oscillator. The high oscillator frequency allows the use of extremely small, low-profile components.
A programmable soft-start feature limits current surges from the input power supply at start-up and provides a simple means of sequencing multiple power supplies.
Other protection features include input undervoltage lockout, current limiting, and thermal shutdown.
기술 문서
| 유형 | 직함 | 날짜 | ||
|---|---|---|---|---|
| * | Data sheet | LM2651 1.5 A High-Efficiency Synchronous Switching Regulator datasheet (Rev. E) | PDF | HTML | 2015/11/03 |
| User guide | LM2651 Step-Down Converter Evaluation Module User's Guide (Rev. D) | PDF | HTML | 2022/01/11 | |
| Selection guide | Buck Converter Quick Reference Guide (Rev. B) | 2021/04/08 | ||
| User guide | LM2651 EVAL 1.5A High Efficiency Synch Switching Reg Eval Board (Rev. A) | 2013/04/24 |
설계 및 개발
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| 패키지 | 핀 | 다운로드 |
|---|---|---|
| TSSOP (PW) | 16 | 옵션 보기 |
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