LP2954A
- 5-V Output within 1.2% Over Temperature
(A Grade) - Adjustable 1.23-V to 29-V Output Voltage Available (LP2954IM and LP2954AIM)
- Ensured 250-mA Output Current
- Extremely Low Quiescent Current
- Low Dropout Voltage
- Reverse Battery Protection
- Extremely Tight Line and Load Regulation
- Very Low Temperature Coefficient
- Current and Thermal Limiting
- Pin Compatible with LM2940 and LM340
(5-V Version Only) - Adjustable Version Adds ERROR Flag to Warn of Output Drop and a Logic-Controlled Shutdown
The LP2954 is a 5-V micropower LDO with very low quiescent current (90 μA typical at 1-mA load) and very low dropout voltage (typically 60 mV at light loads and 470 mV at 250-mA load current).
The quiescent current increases only slightly at dropout (120 μA typical), which prolongs battery life.
The LP2954 with a fixed 5-V output is available in three-pin TO-220 and DDPAK/TO-263 packages. The adjustable LP2954 is provided in an 8-pin, small-outline SOIC package. The adjustable version also provides a resistor network which can be pin strapped to set the output to any voltage from to 1.23 V to 29 V.
Reverse battery protection is provided for the IN pin.
The tight line and load regulation (0.04% typical), as well as very low output temperature coefficient make the LP2954 well suited for use as a low-power voltage reference.
Output accuracy is ensured at both room temperature and over the entire operating temperature range.
For all available packages, see the orderable addendum at the end of the data sheet.技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | LP2954, LP2954A 5-V and Adjustable Micropower LDOs datasheet (Rev. E) | PDF | HTML | 2016/7/28 |
設計與開發
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TIDA-00181 — 含 4 輸出的隔離式 IGBT 柵極推拉式電源
此參考設計透過 24V DC 輸入電源，為絕緣式閘極雙極電晶體 (IGBT) 閘極驅動器提供隔離式正負電壓軌。IGBT 用於三相逆變器中的變頻驅動器，以控制 AC 馬達的速度。此參考設計採用推挽式隔離控制拓撲，提供符合 IEC61800-5 規範的隔離功能，旨在透過預先穩壓的 24Vdc 輸入運作。
透過穩壓（5% 內）輸入來源，可使用推挽式 PWM (...)
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| SOIC (D) | 8 | Ultra Librarian |
| TO-263 (KTT) | 3 | Ultra Librarian |
| TO-220 (NDE) | 3 | Ultra Librarian |
訂購與品質
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。