菜单

关闭

LT3080

可调 1.1A、单电阻、低压差稳压器

英文数据手册

推荐新设计使用

顶部

替代器件

LT3080-1

可并联、1.1A、输出可调的单电阻低压差稳压器
LT3083

可调 3A 单电阻器低压差线性稳压器

概览

优势和特点
产品详情

优势和特点

输出可并联以实现较高电流和散布热量
输出电流：1.1A
利用单个电阻来设置输出电压
SET 引脚电流的初始准确度为 1%
输出可调至 0V
低输出噪声：40μV_RMS (10Hz 至 100kHz)
宽输入电压范围：1.2V 至 36V
低压差：350mV (SOT-223 除外)
< 1mV 负载调节
< 0.001%/V 电压调节
最小负载电流：0.5mA
采用 2.2μF (最小值) 陶瓷输出电容器可稳定
折返电流限制和过热保护功能
采用 8 引脚 MSOP、3mm x 3mm DFN、5 引脚 DD-Pak、TO-220 和 3 引脚 SOT-223 封装

产品详情

LT^®3080 是一款 1.1A 低压差线性稳压器，可直接并联以增加输出电流或在表面贴装型电路板上散播热量。该新型稳压器被设计为一款精准电流源和电压跟随器，因而可在许多需要高电流、可调至零且无散热器的应用中使用。而且，该器件还引出了传输晶体管的集电极，以在与多个输入电源一起使用时实现低压差操作 (低至 350mV)。

LT3080 的一个重要的特点是能够提供一个宽输出电压范围。利用流经单个电阻器的基准电流，可以把输出电压设置为 0V 至 36V 之间的任何电平。当在输出端上使用 2.2μF 电容时，LT3080 可实现稳定，而且该 IC 采用了无需额外 ESR 的小陶瓷电容器，而其他稳压器则常常做不到这一点。

内部保护电路包括电流限制和热限制。LT3080 稳压器采用 8 引脚 MSOP (具有一个裸露衬垫以改善热特性)、3mm x 3mm DFN、5 引脚 DD-Pak、TO-220 和使用简单的 3 引脚 SOT-223 封装版本。

应用

高电流全表面贴封装电源
高效率线性稳压器
用于开关电源的后置稳压器
低元件数目可变电压电源
低输出电压电源

产品分类

电源管理
- 正线性稳压器 (LDO)
- 电流源

领域

工业自动化技术 (IAT)
- 可编程逻辑控制器 (PLC) 和分布式控制系统 (DCS)

产品生命周期推荐新设计使用

本产品已上市。数据手册包含所有最终性能规格和工作条件。ADI公司推荐新设计使用这些产品。

评估套件 (2)

DC995A

LT3080EDD Demo Board | Single Resistor Prog Linear Regulator, 2.3V ≤ V_IN ≤ 25V, V_OUT = 0.6V/1.0V/1.2V/1.5V/1.8V/2.5V/3.3V/5V @ 1.1A

DC1294A

LT3080EDD Demo Board | LT3080(x4), Paralleled, Single Resistor LDOs, 3.8V ≤ V_IN ≤ 25V, V_OUT = 3.3V @ 4.4A

DC995A

查看此评估套件详细信息

Demonstration circuit 995A is an adjustable 1.1A linear regulator featuring the LT3080. Architected as a precision current source and voltage follower, it allows this new regulator to be used in many applications requiring high current, adjustability to zero output, and no heat sink. The device brings out the collector of the pass transistor to allow low dropout operation when used with multiple supplies. The demo board's input supply voltage range is 2.3V to 25V. For proper regulation, the LT3080 has a control pin; the voltage on this pin must be 1.2V to 1.35V higher than the output voltage.The output voltage is jumper selectable and can be set to 1.8V, a value between 0V and 5V (using trimpot R2) or a user-defined value.

A key feature of the LT3080 is its wide output voltage range. By using a reference current through a single resistor, the output voltage can be programmed to any level between zero and 36V. The DC995A has a reduced input voltage 25V due to input capacitor voltage rating. The DC995A can be used as a high current linear regulator, a post regulator for switching supply,a variable voltage supply or a low output voltage power supply.

DC1294A

查看此评估套件详细信息

Demonstration circuit 1294A exercises four adjustable linear regulators in parallel using the LT3080. A small 20 mΩ ballast resistor is required for parallel operation. A short PCB trace can easily serve that purpose. The paralleled devices provide up to 4.4A of output current at 3.3V.

Architected as a precision current source and voltage follower, the LT3080 can be used in many applications requiring high current, adjustability to zero output, and no heat sink. The device brings out the collector of the pass transistor to allow low dropout operation when used with multiple supplies. The LT3080's output voltage can be programmed to any level between 0V and 36V; however the demo board has a reduced input voltage range from 3.8V to 25V due to the input capacitor voltage rating.

文档

数据手册 (1)

PDF

375.00K

LT3080: Adjustable 1.1A Single Resistor Low Dropout Regulator Data Sheet

Reliability Data (1)

PDF

23.66 K

R531 Reliability Data

应用笔记 (5)

PDF

854.76 K

AN-2016：使用ADuM4136隔离式栅极驱动器和LT3999 DC/DC转换器驱动1200 V SiC电源模块 (Rev. 0)

PDF

854.76 K

AN-2016: Using the ADuM4136 Isolated Gate Driver and LT3999 DC-to-DC Converter to Drive a 1200 V SiC Power Module (Rev. 0)

PDF

800.00K

AN140 - 线性稳压器和开关模式电源的基本概念 (Rev. C)

PDF

698.00K

AN140 - Basic Concepts of Linear Regulator and Switching Mode Power Supplies (Rev. C)

PDF

1.00M

AN126 - 2-Wire Virtual Remote Sensing for Voltage Regulators - Clairvoyance Marries Remote Sensing

解决方案通报和手册 (1)

PDF

3.82 M

Linear Low Dropout (LDO) Regulator Solutions

评估板套件使用手册 (2)

DC995A - Demo Manual

DC1294A - Demo Manual

设计笔记 (2)

PDF

279.00K

DN529 - 通过任意长度的铜线控制远端负载的电压

PDF

185.00K

DN529 - Control the Voltage of a Remote Load Over Any Length of Copper Wire

工具及仿真模型

LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

LTspice downloads and documentation

LTspice Simulations

LT3080 Demo Circuit - Parallel 1.1A Single Resistor Low Dropout Regulator (12V to 3V @ 3A)

LT3080 Demo Circuit - 1.1A Single Resistor Low Dropout Regulator (12V to 3V @ 1.1A)

LT3080 Demo Circuit - 1.1A Single Resistor LDO Regulator (12V to 1.8V @ 1A)

Models for the following parts are available in LTspice:

LT3080

LT3080-1

LTpowerCAD

LTpowerCAD^® is a power supply design program which selects power stage components, provides detailed power efficiency, shows quick loop Bode plot stability and load transient analysis, and can export to LTspice for simulation.

LTpowerCAD download and documentation