LM3489EVAL
具有啟用針腳的磁滯 PFET 降壓控制器
LM3489EVAL
概覽
The LM3489 is a high efficiency PFET switching regulator controller that can be used to quickly and easily develop a small, cost effective, switching buck regulator for a wide range of applications. The hysteretic control architecture provides for simple design without any control loop stability concerns using a wide variety of external components. The PFET architecture also allows for low component count as well as ultra-low dropout, and 100% duty cycle operation. Another benefit is high efficiency operation at light loads without an increase in output ripple. A dedicated Enable Pin (Enabled if left unconnected) provides a shutdown mode drawing only 7 µA.
特點
- Wide 4.5V to 35V input range
- 1.239V to VIN adjustable output range
- High efficiency 93%
- 1.3% ( 2% over temp) internal reference
- 100% duty cycle operation
- Maximum operation frequency > 1MHz
- Current limit protection
- Dedicated enable pin (on if unconnected)
- Shutdown mode draws on 7uA supply current
- MSOP-8
Applications
- Set-top Box
- DSL/Cable Modem
- PC/IA
- Auto PC
- TFT Monitor
- Battery Powered Portable Applications
- Distributed Power Systems
- Always On Power
- High Power LED Driver
技術文件
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| 類型 | 標題 | 下載最新的英文版本 | 日期 | |||
|---|---|---|---|---|---|---|
| 證書 | LM3489EVAL/NOPB EU Declaration of Conformity (DoC) | 2019/1/2 | ||||
| 使用指南 | AN-1471 LM3489 Demonstration Board (Rev. A) | 2013/4/25 |