LT1521 具微功率静态电流和停机功能的 300mA、低压差稳压器
LT®1521 / LT1521-3 / LT1521-3.3 / LT1521-5 是低压差稳压器，具有微功率静态电流和停机功能。这些器件能提供 300mA 的输出电流和一个 0.5V 的压差电压。专为在电池供电型系统中使用而设计的低静态电流 (工作时为 12μA，而在停机模式中则为 6μA) 使其成为此类应用的理想选择。静态电流处于良好受控状态；与其他许多低压差 PNP 稳压器不同，这些器件的静态电流在压差情况下不会增大。
LT1521 / LT1521-3 / LT1521-3.3 / LT1521-5 的其他特点包括在采用非常小输出电容器的情况下正常运作之能力。它们可在输出端上仅采用 1.5μF 电容器时保持稳定，而大多数老式器件为实现稳定性则需要使用 10μF 至 100μF 的电容器。可以采用小的陶瓷电容器，因而改善了可制造性。另外，还可以把输入连接至低于输出电压的电压 (包括负电压)，并且不会产生从输出端流向输入端的反向电流。这使得 LT1521 系列非常适用于后备电源场合，在此类场合中输出被保持于高电平，而输入则处于低电平或反转状态。在这些条件下将仅有 5μA 的电流从输出引脚流至地。
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LT1521 订购信息和价格参考Package Variations and Pricing
| 器件型号 | 封装 | 引脚 | 温度 | 价格 (以 1 ~ 99 片为批量) | 价格 (以 1000 片为批量) * |
| LT1521CMS8 | MSOP | 8 | C | $2.65 | $2.20 |
| LT1521CMS8#PBF | MSOP | 8 | C | $2.65 | $2.20 |
| LT1521CMS8-3 | MSOP | 8 | C | $2.65 | $2.20 |
| LT1521CMS8-3#PBF | MSOP | 8 | C | $2.65 | $2.20 |
| LT1521CMS8-3#TR | MSOP | 8 | C | $2.26 | |
| LT1521CMS8-3#TRPBF | MSOP | 8 | C | $2.26 | |
| LT1521CMS8-3.3 | MSOP | 8 | C | $2.65 | $2.20 |
| LT1521CMS8-3.3#PBF | MSOP | 8 | C | $2.65 | $2.20 |
| LT1521CMS8-3.3#TR | MSOP | 8 | C | $2.26 | |
| LT1521CMS8-3.3#TRPBF | MSOP | 8 | C | $2.26 | |
| LT1521CMS8-5 | MSOP | 8 | C | $2.65 | $2.20 |
| LT1521CMS8-5#PBF | MSOP | 8 | C | $2.65 | $2.20 |
| LT1521CS8 | SO | 8 | C | $2.75 | $2.20 |
| LT1521CS8#PBF | SO | 8 | C | $2.75 | $2.20 |
| LT1521CS8#TR | SO | 8 | C | $2.26 | |
| LT1521CS8#TRPBF | SO | 8 | C | $2.26 | |
| LT1521CS8-3 | SO | 8 | C | $2.75 | $2.20 |
| LT1521CS8-3#PBF | SO | 8 | C | $2.75 | $2.20 |
| LT1521CS8-3#TR | SO | 8 | C | $2.26 | |
| LT1521CS8-3#TRPBF | SO | 8 | C | $2.26 | |
| LT1521CS8-3.3 | SO | 8 | C | $2.75 | $2.20 |
| LT1521CS8-3.3#PBF | SO | 8 | C | $2.75 | $2.20 |
| LT1521CS8-3.3#TR | SO | 8 | C | $2.26 | |
| LT1521CS8-3.3#TRPBF | SO | 8 | C | $2.26 | |
| LT1521CS8-5 | SO | 8 | C | $2.75 | $2.20 |
| LT1521CS8-5#PBF | SO | 8 | C | $2.75 | $2.20 |
| LT1521CS8-5#TR | SO | 8 | C | $2.26 | |
| LT1521CS8-5#TRPBF | SO | 8 | C | $2.26 | |
| LT1521CST-3 | SOT | 3 | C | $2.20 | $1.90 |
| LT1521CST-3#PBF | SOT | 3 | C | $2.20 | $1.90 |
| LT1521CST-3#TR | SOT | 3 | C | $1.96 | |
| LT1521CST-3#TRPBF | SOT | 3 | C | $1.96 | |
| LT1521CST-3.3 | SOT | 3 | C | $2.20 | $1.90 |
| LT1521CST-3.3#PBF | SOT | 3 | C | $2.20 | $1.90 |
| LT1521CST-3.3#TR | SOT | 3 | C | $1.96 | |
| LT1521CST-3.3#TRPBF | SOT | 3 | C | $1.96 | |
| LT1521CST-5 | SOT | 3 | C | $2.20 | $1.90 |
| LT1521CST-5#PBF | SOT | 3 | C | $2.20 | $1.90 |
| LT1521CST-5#TR | SOT | 3 | C | $1.96 | |
| LT1521CST-5#TRPBF | SOT | 3 | C | $1.96 | |
| LT1521IS8 | SO | 8 | I | $3.35 | $2.65 |
| LT1521IS8#PBF | SO | 8 | I | $3.35 | $2.65 |
| LT1521IS8#TR | SO | 8 | I | $2.71 | |
| LT1521IS8#TRPBF | SO | 8 | I | $2.71 | |
| LT1521IS8-3 | SO | 8 | I | $3.35 | $2.65 |
| LT1521IS8-3#PBF | SO | 8 | I | $3.35 | $2.65 |
| LT1521IS8-3#TR | SO | 8 | I | $2.71 | |
| LT1521IS8-3#TRPBF | SO | 8 | I | $2.71 | |
| LT1521IS8-3.3 | SO | 8 | I | $3.35 | $2.65 |
| LT1521IS8-3.3#PBF | SO | 8 | I | $3.35 | $2.65 |
| LT1521IS8-5 | SO | 8 | I | $3.35 | $2.65 |
| LT1521IS8-5#PBF | SO | 8 | I | $3.35 | $2.65 |
| LT1521IS8-5#TR | SO | 8 | I | $2.71 | |
| LT1521IS8-5#TRPBF | SO | 8 | I | $2.71 | |
| LT1521IST-3 | SOT | 3 | I | $3.15 | $2.55 |
| LT1521IST-3#PBF | SOT | 3 | I | $3.15 | $2.55 |
| LT1521IST-3#TRPBF | SOT | 3 | I | $2.61 | |
| LT1521IST-3.3 | SOT | 3 | I | $3.15 | $2.55 |
| LT1521IST-3.3#PBF | SOT | 3 | I | $3.15 | $2.55 |
| LT1521IST-3.3#TR | SOT | 3 | I | $2.61 | |
| LT1521IST-3.3#TRPBF | SOT | 3 | I | $2.61 | |
| LT1521IST-5 | SOT | 3 | I | $3.15 | $2.55 |
| LT1521IST-5#PBF | SOT | 3 | I | $3.15 | $2.55 |
| LT1521IST-5#TRPBF | SOT | 3 | I | $2.61 |
LT1521 数据手册及相关资料下载
- 数据手册(英文) : LT1521 - 300mA Low Dropout Regulators with Micropower Quiescent Current and Shutdown.PDF
- 应用指南 (英文) : AN70 - A Monolithic Switching Regulator with 100µV Output Noise.PDF
- 设计要点 (英文) : DN121 - New Micropower, Low Dropout Regulators Ease Battery Supply Designs.PDF
- 可靠性数据 : R321 Reliability Data .PDF
