LT1129 具停机功能的微功率低压差稳压器
LT®1129/LT1129-3.3/LT1129-5 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 400mV 的条件下 (在最大输出) 提供 700mA 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 50μA，而在停机模式中则为 16μA) 使其成为一种理想的选择。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。
LT1129/LT1129-3.3/LT1129-5 的其他特点包括在采用小输出电容器的情况下能正常运作。它们可在输出端上采用仅 3.3μF 的电容器时保持稳定，而大多数老式器件则需要采用 10μF 至 100μF 的输出电容器来实现稳定。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 LT1129/LT1129-3.3/LT1129-5 非常适合于备用电源场合，在这些场合中，输出被保持于高电平和输入处于地电位或被反向。在这些条件下，从输出引脚流至地的电流将仅为 16μA。这些器件采用 5 引脚 TO-220、5 引脚 DD-Pak 和 3 引脚 SOT-223 封装。
产品特点 Features
- 400mV 压差电压
- 700mA 输出电流
- 50μA 静态电流
- 无需保护二极管
- 3.8V 至 30V 可调输出范围
- 3.3V 至 5V 固定输出电压
- 压差条件下的受控静态电流
- 具停机功能
- 停机模式中的静态电流为 16μA
- 可稳定于采用 3.3μF 输出电容器
- 反向电池保护
- 无反向输出电流
- 具热限制功能
- 表面贴装型 SOT-223 和 DD-Pak 封装
|
应用
- 低电流稳压器
- 用于电池供电型系统的稳压器
- 用于开关电源的后置稳压器
- 5V 至 3.3V 逻辑稳压器
典型应用图
参数
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LT1129 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) * |
| LT1129CQ |
DD PAK |
5 |
C |
$3.08 |
$2.45 |
| LT1129CQ#PBF |
DD PAK |
5 |
C |
$3.08 |
$2.45 |
| LT1129CQ#TR |
DD PAK |
5 |
C |
|
$2.57 |
| LT1129CQ#TRPBF |
DD PAK |
5 |
C |
|
$2.57 |
| LT1129CQ-3.3 |
DD PAK |
5 |
C |
$3.08 |
$2.45 |
| LT1129CQ-3.3#PBF |
DD PAK |
5 |
C |
$3.08 |
$2.45 |
| LT1129CQ-3.3#TR |
DD PAK |
5 |
C |
|
$2.57 |
| LT1129CQ-3.3#TRPBF |
DD PAK |
5 |
C |
|
$2.57 |
| LT1129CQ-5 |
DD PAK |
5 |
C |
$3.08 |
$2.45 |
| LT1129CQ-5#PBF |
DD PAK |
5 |
C |
$3.08 |
$2.45 |
| LT1129CQ-5#TR |
DD PAK |
5 |
C |
|
$2.57 |
| LT1129CQ-5#TRPBF |
DD PAK |
5 |
C |
|
$2.57 |
| LT1129CS8 |
SO |
8 |
C |
$3.17 |
$2.50 |
| LT1129CS8#PBF |
SO |
8 |
C |
$3.17 |
$2.50 |
| LT1129CS8#TR |
SO |
8 |
C |
|
$2.56 |
| LT1129CS8#TRPBF |
SO |
8 |
C |
|
$2.56 |
| LT1129CS8-3.3 |
SO |
8 |
C |
$3.17 |
$2.50 |
| LT1129CS8-3.3#PBF |
SO |
8 |
C |
$3.17 |
$2.50 |
| LT1129CS8-3.3#TR |
SO |
8 |
C |
|
$2.56 |
| LT1129CS8-3.3#TRPBF |
SO |
8 |
C |
|
$2.56 |
| LT1129CS8-5 |
SO |
8 |
C |
$3.17 |
$2.50 |
| LT1129CS8-5#PBF |
SO |
8 |
C |
$3.17 |
$2.50 |
| LT1129CS8-5#TR |
SO |
8 |
C |
|
$2.56 |
| LT1129CS8-5#TRPBF |
SO |
8 |
C |
|
$2.56 |
| LT1129CST-3.3 |
SOT |
3 |
C |
$2.83 |
$2.30 |
| LT1129CST-3.3#PBF |
SOT |
3 |
C |
$2.83 |
$2.30 |
| LT1129CST-3.3#TR |
SOT |
3 |
C |
|
$2.36 |
| LT1129CST-3.3#TRPBF |
SOT |
3 |
C |
|
$2.36 |
| LT1129CST-5 |
SOT |
3 |
C |
$2.83 |
$2.30 |
| LT1129CST-5#PBF |
SOT |
3 |
C |
$2.83 |
$2.30 |
| LT1129CST-5#TR |
SOT |
3 |
C |
|
$2.36 |
| LT1129CST-5#TRPBF |
SOT |
3 |
C |
|
$2.36 |
| LT1129CT |
TO-220 |
5 |
C |
$2.67 |
$2.15 |
| LT1129CT#PBF |
TO-220 |
5 |
C |
$2.67 |
$2.15 |
| LT1129CT-3.3 |
TO-220 |
5 |
C |
$2.67 |
$2.15 |
| LT1129CT-3.3#06PBF |
TO-220 |
5 |
C |
$2.67 |
$2.15 |
| LT1129CT-3.3#PBF |
TO-220 |
5 |
C |
$2.67 |
$2.15 |
| LT1129CT-5 |
TO-220 |
5 |
C |
$2.67 |
$2.15 |
| LT1129CT-5#06PBF |
TO-220 |
5 |
C |
$2.67 |
$2.15 |
| LT1129CT-5#30 |
TO-220 |
5 |
C |
|
|
| LT1129CT-5#31 |
TO-220 |
5 |
C |
|
|
| LT1129CT-5#PBF |
TO-220 |
5 |
C |
$2.67 |
$2.15 |
| LT1129IQ |
DD PAK |
5 |
I |
$3.67 |
$2.95 |
| LT1129IQ#PBF |
DD PAK |
5 |
I |
$3.67 |
$2.95 |
| LT1129IQ#TR |
DD PAK |
5 |
I |
|
$3.07 |
| LT1129IQ#TRPBF |
DD PAK |
5 |
I |
|
$3.07 |
| LT1129IQ-3.3 |
DD PAK |
5 |
I |
$3.67 |
$2.95 |
| LT1129IQ-3.3#PBF |
DD PAK |
5 |
I |
$3.67 |
$2.95 |
| LT1129IQ-3.3#TR |
DD PAK |
5 |
I |
|
$3.07 |
| LT1129IQ-3.3#TRPBF |
DD PAK |
5 |
I |
|
$3.07 |
| LT1129IQ-5 |
DD PAK |
5 |
I |
$3.67 |
$2.95 |
| LT1129IQ-5#PBF |
DD PAK |
5 |
I |
$3.67 |
$2.95 |
| LT1129IQ-5#TR |
DD PAK |
5 |
I |
|
$3.07 |
| LT1129IQ-5#TRPBF |
DD PAK |
5 |
I |
|
$3.07 |
| LT1129IS8 |
SO |
8 |
I |
$3.75 |
$2.95 |
| LT1129IS8#PBF |
SO |
8 |
I |
$3.75 |
$2.95 |
| LT1129IS8#TR |
SO |
8 |
I |
|
$3.01 |
| LT1129IS8#TRPBF |
SO |
8 |
I |
|
$3.01 |
| LT1129IS8-3.3 |
SO |
8 |
I |
$3.75 |
$2.95 |
| LT1129IS8-3.3#PBF |
SO |
8 |
I |
$3.75 |
$2.95 |
| LT1129IS8-3.3#TR |
SO |
8 |
I |
|
$3.01 |
| LT1129IS8-3.3#TRPBF |
SO |
8 |
I |
|
$3.01 |
| LT1129IS8-5 |
SO |
8 |
I |
$3.75 |
$2.95 |
| LT1129IS8-5#PBF |
SO |
8 |
I |
$3.75 |
$2.95 |
| LT1129IS8-5#TR |
SO |
8 |
I |
|
$3.01 |
| LT1129IS8-5#TRPBF |
SO |
8 |
I |
|
$3.01 |
| LT1129IST-3.3 |
SOT |
3 |
I |
$3.17 |
$2.60 |
| LT1129IST-3.3#PBF |
SOT |
3 |
I |
$3.17 |
$2.60 |
| LT1129IST-3.3#TR |
SOT |
3 |
I |
|
$2.66 |
| LT1129IST-3.3#TRPBF |
SOT |
3 |
I |
|
$2.66 |
| LT1129IST-5 |
SOT |
3 |
I |
$3.17 |
$2.60 |
| LT1129IST-5#PBF |
SOT |
3 |
I |
$3.17 |
$2.60 |
| LT1129IST-5#TR |
SOT |
3 |
I |
|
$2.66 |
| LT1129IST-5#TRPBF |
SOT |
3 |
I |
|
$2.66 |
| LT1129IT |
TO-220 |
5 |
I |
$3.17 |
$2.60 |
| LT1129IT#06PBF |
TO-220 |
5 |
I |
$3.17 |
$2.60 |
| LT1129IT#PBF |
TO-220 |
5 |
I |
$3.17 |
$2.60 |
| LT1129IT-3.3 |
TO-220 |
5 |
I |
$3.17 |
$2.60 |
| LT1129IT-3.3#PBF |
TO-220 |
5 |
I |
$3.17 |
$2.60 |
| LT1129IT-5 |
TO-220 |
5 |
I |
$3.17 |
$2.60 |
| LT1129IT-5#06PBF |
TO-220 |
5 |
I |
$3.17 |
$2.60 |
| LT1129IT-5#PBF |
TO-220 |
5 |
I |
$3.17 |
$2.60 |
| LT1129MPST-3.3 |
SOT |
3 |
MP |
$10.03 |
$7.02 |
| LT1129MPST-3.3#PBF |
SOT |
3 |
MP |
$10.03 |
$7.02 |
| LT1129MPST-3.3#TR |
SOT |
3 |
MP |
|
$7.08 |
| LT1129MPST-3.3#TRPBF |
SOT |
3 |
MP |
|
$7.08 |
演示电路板
| 器件型号 |
描述 |
| DC1401A |
LT1129EDCB Demo Board | Adjustable 500mA Single Resistor Low Dropout Regulator |
LT1129 数据手册及相关资料下载
- 数据手册(英文) : LT1129/LT1129-3.3/LT1129-5 - Micropower Low Dropout Regulators with Shutdown.PDF
- 应用指南 (英文) : AN51 - Power Conditioning for Notebook and Palmtop Systems.PDF
- 应用指南 (英文) : AN58 - 5V to 3.3V Converters for Microprocessor Systems.PDF
- 应用指南 (英文) : AN65 - A Fourth Generation of LCD Backlight Technology.PDF
- 设计要点 (英文) : DN74 - Techniques for Deriving 3.3V from 5V Supplies.PDF
- 设计要点 (英文) : DN82 - 5V to 3.3V Regulator with Fail-Safe Switchover.PDF
- 设计要点 (英文) : DN91 - 5V to 3.3V Circuit Collection.PDF
- 可靠性数据 : R086 Reliability Data .PDF
