LT1121 - 具停机功能的微功率低压差稳压器
LT®1121 / LT1121-3.3 / LT1121-5 是具停机功能的微功率低压差稳压器。这些器件能够在压差电压为 0.4V 的条件下提供 150mA 的输出电流。它们专为在电池供电型系统中使用而设计，低静态电流 (在工作期间为 30μA，而在停机模式中则为 16μA) 使其成为一种理想的选择。静态电流处于良好受控状态；在压差条件下，静态电流不会上升，这与许多其他的低压差 PNP 稳压器是不同的。 LT1121 / LT1121-3.3 / LT1121-5 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的能力。它们可在输出端上布设了仅 0.33μF 电容器的情况下实现稳定，而大多数老式器件则需要采用 1μF 至 100μF 的输出电容器来实现稳定。由于能够使用小的陶瓷电容器，因而增强了可制造性。另外，输入可以连接至地或一个反向电压，而不会产生从输出端流至输入端的反向电流。这使得 LT1121 系列非常适合于那些输出被保持于高电平和输入处于地电位或被反转的备用电源场合。在这些条件下，从输出引脚流至地的电流将仅为 16μA。
特点
典型应用  | 应用
封装信息   |
| 器件型号 | 封装 | 温度 | 价格 (以 1 ~ 99 片为批量) | 价格 (以 1000 片为批量) * |
|---|---|---|---|---|
| LT1121ACS8-3.3#PBF | SO-8 | C | $2.50 | $1.95 |
| LT1121ACS8-3.3#TRPBF | SO-8 | C | $2.01 | |
| LT1121ACS8-5#PBF | SO-8 | C | $2.50 | $1.95 |
| LT1121ACS8-5#TRPBF | SO-8 | C | $2.01 | |
| LT1121ACS8#PBF | SO-8 | C | $2.50 | $1.95 |
| LT1121ACS8#TRPBF | SO-8 | C | $2.01 | |
| LT1121AHVCS8#PBF | SO-8 | C | $2.78 | $2.35 |
| LT1121AHVCS8#TRPBF | SO-8 | C | $2.42 | |
| LT1121AHVIS8#PBF | SO-8 | I | $3.26 | $2.75 |
| LT1121AHVIS8#TRPBF | SO-8 | I | $2.81 | |
| LT1121AIS8-3.3#PBF | SO-8 | I | $2.92 | $2.30 |
| LT1121AIS8-3.3#TRPBF | SO-8 | I | $2.36 | |
| LT1121AIS8-5#PBF | SO-8 | I | $2.92 | $2.30 |
| LT1121AIS8-5#TRPBF | SO-8 | I | $2.36 | |
| LT1121AIS8#PBF | SO-8 | I | $2.92 | $2.30 |
| LT1121AIS8#TRPBF | SO-8 | I | $2.36 | |
| LT1121CN8-3.3#PBF | N-8 | C | $1.83 | $1.50 |
| LT1121CN8-5#PBF | N-8 | C | $1.83 | $1.50 |
| LT1121CN8#PBF | N-8 | C | $1.83 | $1.50 |
| LT1121CS8-3.3#PBF | SO-8 | C | $2.00 | $1.60 |
| LT1121CS8-3.3#TRPBF | SO-8 | C | $1.66 | |
| LT1121CS8-5#PBF | SO-8 | C | $2.00 | $1.60 |
| LT1121CS8-5#TRPBF | SO-8 | C | $1.66 | |
| LT1121CS8#PBF | SO-8 | C | $2.00 | $1.60 |
| LT1121CS8#TRPBF | SO-8 | C | $1.66 | |
| LT1121CST-3.3#PBF | SOT-223 | C | $2.17 | $1.70 |
| LT1121CST-3.3#TRPBF | SOT-223 | C | $1.76 | |
| LT1121CST-5#PBF | SOT-223 | C | $2.17 | $1.70 |
| LT1121CST-5#TRPBF | SOT-223 | C | $1.76 | |
| LT1121CZ-3.3#PBF | TO-92 | C | $1.58 | $1.30 |
| LT1121CZ-3.3#TRPBF | TO-92 | C | $1.36 | |
| LT1121CZ-5#PBF | TO-92 | C | $1.58 | $1.30 |
| LT1121CZ-5#TRPBF | TO-92 | C | $1.36 | |
| LT1121HVCS8#PBF | SO-8 | C | $2.25 | $1.90 |
| LT1121HVCS8#TRPBF | SO-8 | C | $1.96 | |
| LT1121HVIS8#PBF | SO-8 | I | $2.78 | $2.35 |
| LT1121HVIS8#TRPBF | SO-8 | I | $2.41 | |
| LT1121IN8-3.3#PBF | N-8 | I | $2.17 | $1.80 |
| LT1121IN8-5#PBF | N-8 | I | $2.17 | $1.80 |
| LT1121IN8#PBF | N-8 | I | $2.17 | $1.80 |
| LT1121IS8-3.3#PBF | SO-8 | I | $2.42 | $1.95 |
| LT1121IS8-3.3#TRPBF | SO-8 | I | $2.01 | |
| LT1121IS8-5#PBF | SO-8 | I | $2.42 | $1.95 |
| LT1121IS8-5#TRPBF | SO-8 | I | $2.01 | |
| LT1121IS8#PBF | SO-8 | I | $2.42 | $1.95 |
| LT1121IS8#TRPBF | SO-8 | I | $2.01 | |
| LT1121IST-3.3#PBF | SOT-223 | I | $2.58 | $2.05 |
| LT1121IST-3.3#TRPBF | SOT-223 | I | $2.11 | |
| LT1121IST-5#PBF | SOT-223 | I | $2.58 | $2.05 |
| LT1121IST-5#TRPBF | SOT-223 | I | $2.11 | |
| LT1121IZ-3.3#PBF | TO-92 | I | $1.92 | $1.55 |
| LT1121IZ-3.3#TRPBF | TO-92 | I | $1.61 | |
| LT1121IZ-5#PBF | TO-92 | I | $1.92 | $1.55 |
| LT1121IZ-5#TRPBF | TO-92 | I | $1.61 |
- LT1121 Package Drawing LT1121
- LT1121 Package Drawing LT1121
- AN51 - Power Conditioning for Notebook and Palmtop Systems
- AN53 - Micropower High Side MOSFET Drivers
- AN54 - Power Conversion from Milliamps to Amps at Ultra-High Efficiency (Up to 95%)
- AN58 - 5V to 3.3V Converters for Microprocessor Systems
- AN60 - PCMCIA Card and Card Socket Power Management:
- AN67 - Linear Technology Magazine Circuit Collection, Volume III
- DN210 - 2-Phase, Dual Switching Regulator Fits in Tight Places
- DN74 - Techniques for Deriving 3.3V from 5V Supplies
- DN76 - PC Card Power Management Techniques
- DN78 - Triple Output 3.3V, 5V, and 12V High Efficiency Notebook Power Supply
- DN82 - 5V to 3.3V Regulator with Fail-Safe Switchover
- DN91 - 5V to 3.3V Circuit Collection
- DN96 - 12-Bit Rail-to-Rail Micropower DACs in an SO-8
- R086 Reliability Data
- Three-Terminal Linear Regulator Evolution Continues Unabated
- LT1121 Footprints and Symbols
- LT1121-3.3 Demo Circuit - 5V Battery-Powered Supply with Shutdown (3.7-20V to 3.3 @ 150mA)
