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.
技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | LM2757 Switched-Capacitor Boost Regulator With High Impedance Output in Shutdown datasheet (Rev. F) | PDF | HTML | 2015年 7月 18日 |
| Application note | How to Meet the HDMI 5V Source Requirement (Rev. C) | 2019年 9月 26日 | ||
| White paper | The Forgotten Converter | 2015年 6月 15日 | ||
| EVM User's guide | AN-1731 LM2757 Evaluation Board (Rev. A) | 2013年 4月 30日 | ||
| Application note | Designing Energy-Efficient Handheld Illum Solutions (Rev. A) | 2013年 4月 30日 |
設計與開發
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LM2757TMEV — 在關機時具有高阻抗輸出的高效率切換式電容器升壓穩壓器
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 (...)
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| DSBGA (YFQ) | 12 | Ultra Librarian |
訂購與品質
- RoHS
- REACH
- 產品標記
- 鉛塗層/球物料
- MSL 等級/回焊峰值
- MTBF/FIT 估算值
- 材料內容
- 認證摘要
- 進行中持續性的可靠性監測
- 晶圓廠位置
- 組裝地點