LM2757
- Dual Gain Converter (2×, 3/2×) With up to 93%
Efficiency - Inductorless Solution Uses Only 4 Small Ceramic
Capacitors - Total Solution Area < 12 mm2
- True Input-Output and Output-Input Disconnect
- Up to 180-mA Output Current Capability (5 V)
- Selectable 4.1-V, 4.5-V or 5-V Output
- Pre-Regulation Minimizes Input Current Ripple
- 1.24-MHz Switching Frequency for Low-Noise,
Low-Ripple Output Voltage - Integrated Overcurrent and Thermal Shutdown
Protection
The LM2757 is a constant-frequency pre-regulated switched-capacitor charge pump that operates at 1.25 MHz to produce a low-noise regulated output voltage. The device can be configured to provide up to 100 mA at 4.1 V, 110 mA at 4.5 V, or 180 mA at 5 V. Excellent efficiency is achieved without the use of an inductor by operating the charge pump in a gain of either 3/2 or 2 according to the input voltage and output voltage option selection.
The LM2757 presents a high impedance at the VOUT pin when shut down. This allows for use in applications that require the regulated output bus to be driven by another supply while the LM2757 is shut down.
The LM2757 device comes in a tiny 12-pin 0.4-mm pitch DSBGA package. A perfect fit for space-constrained, battery-operated applications, the device requires only 4 small, inexpensive ceramic capacitors. Built-in soft-start, overcurrent protection, and thermal shutdown features are also included in this device.
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 | LM2757 Switched-Capacitor Boost Regulator With High Impedance Output in Shutdown 数据表 (Rev. F) | PDF | HTML | 2015-7-18 | ||
| 应用手册 | How to Meet the HDMI 5V Source Requirement (Rev. C) | 2019-9-26 | ||||
| 白皮书 | The Forgotten Converter | 2015-6-15 | ||||
| 应用手册 | Designing Energy-Efficient Handheld Illum Solutions (Rev. A) | 2013-4-30 |
设计与开发
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LM2757TMEV — 具有高阻抗输出（停机时）的高效开关电容器升压稳压器 EVM
The LM2757 is a constant frequency pre-regulated switched-capacitor charge pump that operates at 1.25MHz to produce a low-noise regulated output voltage. The device can be configured to provide up to 100mA at 4.1V, 110mA at 4.5V, or 180mA at 5V. Excellent efficiency is achieved without the use of (...)
| 封装 | 引脚 | CAD 符号、封装和 3D 模型 |
|---|---|---|
| DSBGA (YFQ) | 12 | Ultra Librarian |
订购和质量
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