LM2940-N
- Input Voltage Range = 6 V to 26 V
- Dropout Voltage Typically 0.5 V at IOUT = 1 A
- Output Current in Excess of 1 A
- Output Voltage Trimmed Before Assembly
- Reverse Battery Protection
- Internal Short Circuit Current Limit
- Mirror Image Insertion Protection
- P+ Product Enhancement Tested
The LM2940-N and LM2940C positive voltage regulators feature the ability to source 1 A of output current with a dropout voltage of typically 0.5 V and a maximum of 1 V over the entire temperature range. Furthermore, a quiescent current reduction circuit has been included which reduces the ground current when the differential between the input voltage and the output voltage exceeds approximately 3 V. The quiescent current with 1 A of output current and an input-output differential of 5 V is therefore only 30 mA. Higher quiescent currents only exist when the regulator is in the dropout mode (VIN − VOUT ≤ 3 V).
Designed also for vehicular applications, the LM2940-N and LM2940C and all regulated circuitry are protected from reverse battery installations or 2-battery jumps. During line transients, such as load dump when the input voltage can momentarily exceed the specified maximum operating voltage, the regulator will automatically shut down to protect both the internal circuits and the load. The LM2940-N and LM2940C cannot be harmed by temporary mirror-image insertion. Familiar regulator features such as short circuit and thermal overload protection are also provided.
技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | LM2940x 1-A Low Dropout Regulator datasheet (Rev. J) | PDF | HTML | 2014年 12月 22日 |
| Selection guide | Low Dropout Regulators Quick Reference Guide (Rev. P) | 2018年 3月 21日 | ||
| Application note | Linear power for automated industrial systems | 2015年 1月 9日 | ||
| More literature | Die D/S LM2940-5.0 MD8 1A Low Dropout Adjustable Regulator | 2012年 12月 20日 | ||
| Application note | Linear and Switching Voltage Regulator Fundamental Part 1 | 2007年 3月 21日 |
設計與開發
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只需要單脈衝寬度調變輸入，具有互補脈衝寬度調變訊號，和板上產生的對應失效時間。使用具有短接地彈簧的示波器探針，提供探針點來測量主要邏輯和功率級波形。
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| SOT-223 (DCY) | 4 | Ultra Librarian |
| TO-220 (NDE) | 3 | Ultra Librarian |
| TO-220 (NEB) | 3 | Ultra Librarian |
| TO-263 (KTT) | 3 | Ultra Librarian |
| WSON (NGN) | 8 | 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
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。