LP2989
- 2.1-V to 16-V Input Voltage Range
- 2.5-V to 5-V Fixed Output Voltage Options
- Ultra-Low Dropout Voltage
- 500-mA Continuous Output Current
- Very Low Output Noise With External Capacitor
- < 0.8-µA Quiescent Current When Shutdown
- Low Ground Pin Current at All Loads
- 0.75% Output Voltage Accuracy (A Grade)
- High Peak Current Capability (800-mA typical)
- Overtemperature and Overcurrent Protection
- −40°C to 125°C Junction Temperature Range
The LP2989 is a fixed-output 500-mA precision LDO regulator designed for use with ceramic output capacitors.
Output noise can be reduced to 18 µV (typical) by connecting an external 10-nF capacitor to the bypass pin.
Using an optimized Vertically Integrated PNP (VIP) process, the LP2989 delivers superior performance:
- Dropout Voltage: Typically 310 mV at 500-mA load, and 1 mV at 100-µA load.
- Ground Pin Current: Typically 3 mA at 500-mA load, and 110 µA at 100-µA load.
- Sleep Mode: The LP2989 draws less than 0.8-µA quiescent current when SHUTDOWN pin is pulled low.
- Error Flag: The built-in error flag goes low when the output drops approximately 5% below nominal.
- Precision Output: Output voltage accuracy is 0.75% (A grade) and 1.25% (standard grade) at room temperature.
For output voltages < 2 V, see LP2989LV (SNVS086) data sheet.
技术文档
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| 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 | LP2989 Micropower and Low-Noise, 500-mA Ultra Low-Dropout Regulator for Use With Ceramic Output Capacitors 数据表 (Rev. O) | PDF | HTML | 2015-3-10 | ||
| 选择指南 | 电源管理指南 2018 | 2018-7-31 | ||||
| 选择指南 | Low Dropout Regulators Quick Reference Guide (Rev. P) | 2018-3-21 |
设计与开发
如需其他信息或资源，请点击以下任一标题进入详情页面查看（如有）。
| 封装 | 引脚 | CAD 符号、封装和 3D 模型 |
|---|---|---|
| SOIC (D) | 8 | Ultra Librarian |
| VSSOP (DGK) | 8 | Ultra Librarian |
| WSON (NGN) | 8 | Ultra Librarian |
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