LM2663
- Inverts or Doubles Input Supply Voltage
- 3.5-Ω Typical Output Resistance
- 86% Typical Conversion Efficiency at 200 mA
- (LM2662) Selectable Oscillator Frequency:
20 kHz/150 kHz - (LM2663) Low Current Shutdown Mode
The LM2662/LM2663 CMOS charge-pump voltage converter inverts a positive voltage in the range of 1.5 V to 5.5 V to the corresponding negative voltage. The LM2662/LM2663 uses two low cost capacitors to provide 200 mA of output current without the cost, size, and EMI related to inductor based converters. With an operating current of only 300 µA and operating efficiency greater than 90% at most loads, the LM2662/LM2663 provides ideal performance for battery powered systems. The LM2662/LM2663 may also be used as a positive voltage doubler.
The oscillator frequency can be lowered by adding an external capacitor to the OSC pin. Also, the OSC pin may be used to drive the LM2662/LM2663 with an external clock. For LM2662, a frequency control (FC) pin selects the oscillator frequency of 20 kHz or 150 kHz. For LM2663, an external shutdown (SD) pin replaces the FC pin. The SD pin can be used to disable the device and reduce the quiescent current to 10 µA. The oscillator frequency for LM2663 is 150 kHz.
技术文档
| 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 | LM266x Switched Capacitor Voltage Converter 数据表 (Rev. E) | PDF | HTML | 2014-10-31 | ||
| 白皮书 | The Forgotten Converter | 2015-6-15 |
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）。
LM2661-3-4EVAL — 开关电容器电压转换器
LM2661、LM2663 和 LM2664 是 CMOS 电荷泵电压转换器系列器件（表 2）。每个转换器都使用两个小型电容器来实现电压反转或电压加倍，远离基于电感器的转换器的成本、尺寸和 EMI 困扰。每个器件都具有关断功能，LM2661 和 LM2663 还提供从外部源运行时钟振荡器的功能。您还可以使用 LM2661 和 LM2663 上的外部电容器来降低时钟速度。这些电路外形小巧、纤薄，非常适合手机、笔记本电脑、运算放大器电源、接口电源、医疗仪器、PDA 和手持仪器。
| 封装 | 引脚 | CAD 符号、封装和 3D 模型 |
|---|---|---|
| SOIC (D) | 8 | Ultra Librarian |
订购和质量
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