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LT3080

可调 1.1A、单电阻、低压差稳压器

英文数据手册

Rev. D

推荐新设计使用

顶部

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

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演示板 | LT3080(x4)，并联单电阻LDO，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

演示电路1294A使用LT3080执行四个并联的可调线性稳压器。并行操作需要小型20 mΩ镇流电阻。较短的PCB走线可以轻松实现此目的。并联器件在3.3V时提供高达4.4A的输出电流。

LT3080构建作为精密电流源和电压跟随器，可用于许多需要高电流、调整为零输出且无需散热器的应用。配合多个电源使用时，该器件会引出调整管的集电极以实现低压差工作。LT3080的输出电压可以编程为在0V和36V之间的任何电平；不过，由于输入电容电压额定值，演示板具有3.8V至25V的较低输入电压范围。

文档

数据手册 (1)

PDF

1.37 M

LT3080: Adjustable 1.1A Single Resistor Low Dropout Regulator Data Sheet (Rev. D)

Reliability Data (1)

PDF

23.66 K

R531 Reliability Data

应用笔记 (3)

PDF

1.00M

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

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

AN-140: 线性调节器和开关模式电源的基本概念

用户手册 (2)

DC995A - Demo Manual

DC1294A - Demo Manual

设计笔记 (1)

设计要点 529: 通过任意长度的铜线控制远端负载的电压

工具及仿真模型

LTspice

LTspice^®是一款强大高效的免费仿真软件、原理图采集和波形观测器，为改善模拟电路的仿真提供增强功能和模型。

启动此部分的现成LTspice演示电路：

第1步：下载并在计算机上安装LTspice。

第2步：单击下面的链接，下载演示电路。

第3步：如果在单击以下链接之后LTspice未自动打开，可通过右击该链接并选择“目标另存为”来运行该仿真。将文件保存到计算机之后，请启动LTspice并从“文件”菜单中选择“打开”来打开演示电路。

下载 LTspice 文档

LTspice仿真

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)

LTspice中提供以下器件型号：

LT3080

LT3080-1

参考电路 (9)

Terasic DE1-SoC Development Kit

Altera Arria V GX FPGA Development Kit

Altera DSP Development Kit, Stratix V Edition

Terasic DE0-Nano-SoC Kit / Atlas-SoC Kit

Arrow/Terasic SoCKit Development Kit

Altera Transceiver Signal Integrity Kit, Stratix IV GX Edition

MAX 10 NEEK Development Kit

Stratix V Advanced System Development Board

Terasic DE10-Nano Kit

Terasic DE1-SoC Development Kit

查看此参考电路详细信息

优势和特点

Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
Our reference designs are supported by an intuitive design tool set and IP
Our team can provide designs for quick prototypes that can speed time to market in the most complex applications

所用产品

Altera Arria V GX FPGA Development Kit

查看此参考电路详细信息

优势和特点

Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
Our reference designs are supported by an intuitive design tool set and IP
Our team can provide designs for quick prototypes that can speed time to market in the most complex applications

所用产品

Altera DSP Development Kit, Stratix V Edition

查看此参考电路详细信息

优势和特点

Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
Our reference designs are supported by an intuitive design tool set and IP
Our team can provide designs for quick prototypes that can speed time to market in the most complex applications

所用产品

Terasic DE0-Nano-SoC Kit / Atlas-SoC Kit

查看此参考电路详细信息

优势和特点

Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
Our reference designs are supported by an intuitive design tool set and IP
Our team can provide designs for quick prototypes that can speed time to market in the most complex applications

所用产品

Arrow/Terasic SoCKit Development Kit

查看此参考电路详细信息

优势和特点

Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
Our reference designs are supported by an intuitive design tool set and IP
Our team can provide designs for quick prototypes that can speed time to market in the most complex applications

所用产品

Altera Transceiver Signal Integrity Kit, Stratix IV GX Edition

查看此参考电路详细信息

优势和特点

Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
Our reference designs are supported by an intuitive design tool set and IP
Our team can provide designs for quick prototypes that can speed time to market in the most complex applications

所用产品

MAX 10 NEEK Development Kit

查看此参考电路详细信息

优势和特点

Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
Our reference designs are supported by an intuitive design tool set and IP
Our team can provide designs for quick prototypes that can speed time to market in the most complex applications

所用产品

Stratix V Advanced System Development Board

查看此参考电路详细信息

优势和特点

Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
Our reference designs are supported by an intuitive design tool set and IP
Our team can provide designs for quick prototypes that can speed time to market in the most complex applications

所用产品

Terasic DE10-Nano Kit

查看此参考电路详细信息

优势和特点

Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
Our reference designs are supported by an intuitive design tool set and IP
Our team can provide designs for quick prototypes that can speed time to market in the most complex applications