LT3083

推荐用于新设计

可调 3A 单电阻器低压差线性稳压器

数据手册 (Rev. B) 产品选型表
产品技术资料帮助

ADI公司所提供的资料均视为准确、可靠。但本公司不为用户在应用过程中侵犯任何专利权或第三方权利承担任何责任。技术指标的修改不再另行通知。本公司既没有含蓄的允许，也不允许借用ADI公司的专利或专利权的名义。本文出现的商标和注册商标所有权分别属于相应的公司。
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概述

  • 可把输出并联以提供较高的电流和散热量
  • 输出电流：3A
  • 由单个电阻器来设置输出电压
  • 50μA SET 引脚电流：1% 初始准确度
  • 输出可调至 0V
  • 低输出噪声：40μVRMS (10Hz 至 100kHz)
  • 宽输入电压范围：1.2V 至 23V (DD-Pak 和 TO-220 封装)
  • 低压差电压：310mV
  • <1mV 负载调整
  • <0.001%/V 电压调整率
  • 最小负载电流：1mA
  • 采用 10μF 最小陶瓷电容器时可实现稳定
  • 具折返的电流限制和过热保护
  • 采用 16 引脚 TSSOP、12 引脚 4mm x 4mm DFN、5 引脚 TO-220 和 5 引脚表面贴装型 DD-PAK 封装

 

LT®3083 是一款 3A 低压差线性稳压器，可通过并联来增加输出电流或在表面贴装型电路板上散播热量。这款新型稳压器专为用作一个精准电流源和电压跟随器而设计，可在许多要求高电流、至零的可调节能力和不设置散热器的应用中使用。另外，该器件还将传输晶体管的集电极引出，以在与多个电源一起使用时实现低压差 (低至 310mV) 运作。

LT3083 的重要特点之一是能够提供一个宽输出电压范围。利用流过单个电阻器的一个基准电流，可把输出电压设置在 0V 至 23V 之间的任意电平 (DD-PAK 和 TO-220 封装)。当在输出端上使用 10μF 电容时，LT3083 可实现稳定，而且该 IC 能在采用小的陶瓷电容器时保持稳定，而不像其他稳压器所常见的那样需要额外的 ESR。

内部保护电路包括电流限制和热限制。LT3083 采用 16 引脚 TSSOP 封装 (具有一个裸露衬垫以实现更加优良的热特性)、12 引脚 4mm x 4mm DFN 封装 (也具有一个裸露衬垫)、5 引脚 TO-220 封装和 5 引脚表面贴装型 DD-PAK 封装。

 


Applications

  • 高电流全表面贴装型电源
  • 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

 
LT3083
可调 3A 单电阻器低压差线性稳压器
LT3083 1.5V to 0.9V at 3A Supply (Using 3.3V Vcontrol) Set Pin Current Distribution Product Package 1 Product Package 2 Product Package 3 Product Package 4
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参考资料

数据手册 1

可靠性数据 1

用户手册 1

技术文章 5

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软件资源

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硬件生态系统

部分模型 产品周期 描述
保护开关和控制器 2
LTC4370
推荐用于新设计 双电源二极管 “合路” 电流平衡控制器
LT4363
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电源系统管理(PSM)和时序控制器 1
LTC2977
推荐用于新设计 具准确输出电压测量功能的 8 通道 PMBus 电源系统管理器
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工具及仿真模型

LTspice 2

LTspice中提供以下器件型号：

  • LT3083
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。

评估套件

eval board
schematic 1
schematic 2
schematic 3
schematic 4
schematic 5
DC1585A

LT3083EQ Demo Board | Single Resistor Prog Low Dropout Linear Regulator, 1.7V ≤ VIN ≤ 23V, VOUT = 1.2V/1.5V/1.8V/2.5V/3.3V/5.0V @ 3A

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产品详情

Demonstration circuit 1585A is an adjustable 3A linear regulator featuring the LT3083 in the DD-PAK-5 package. Architected as a precision current source and voltage follower, the LT3083 can be used in many applications requiring high current, adjustability to zero output, and no heat sink. Internal protection circuitry includes current limiting and thermal limiting.The device brings out the collector of the pass transistor to allow low dropout operation when used with multiple supplies.


The demo board oprerates with an input supply voltage range of 1.7V to 23V. A control voltage bias supply that is 1.2V to 1.4V higher than the input voltage is required for proper regulation. A key feature of the LT3083 is its wide output voltage range. The DC1585A's jumper-selectable output voltage can be set to 1.2V, 1.5V, 1.8V, 2.5V, 3.3V, 5.0V, or a user-selectable value. DC1585A can be used as a high current linear regulator, a post regulator for switching supplies, a variable voltage supply or a low output voltage power supply.
DC1585A
LT3083EQ Demo Board | Single Resistor Prog Low Dropout Linear Regulator, 1.7V ≤ VIN ≤ 23V, VOUT = 1.2V/1.5V/1.8V/2.5V/3.3V/5.0V @ 3A
DC1585A - Schematic DC1585A Demo Board DC1585A Demo Board DC1585A Demo Board DC1585A Demo Board

参考电路

DK-DEV-5SGXEA7N Dev Kit
DK-DEV-5SGXEA7N Dev Kit
LTC Parts List
DK-DEV-5SGXEA7N Block Diagram
DK-DEV-5SGXEA7N Power Tree
DK-DEV-5SGXEA7N Power Tree No TI
Altera Stratix V GX FPGA Development Kit 参考设计

查看参考设计详情

特性和优点

  • 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
Terasic DE2i-150 Cyclone IV Board
Terasic DE2i-150 Cyclone IV Board
LTC Parts List
Terasic DE2i-150 Cyclone IV Block Diagram
DE2i-150 Power Tree
Terasic DE2i-150 Cyclone IV Board 参考设计

查看参考设计详情

特性和优点

  • 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
Stratix V Advanced System Development Board
Stratix V Advanced System Development Board
Stratix V Advanced System Development Board Block Diagram
Stratix V Advanced Systems Development Board Power Tree
Stratix V Advanced System Development Board 参考设计

查看参考设计详情

特性和优点

  • 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
Altera Stratix V GX FPGA Development Kit
DK-DEV-5SGXEA7N Dev Kit
LTC Parts List
DK-DEV-5SGXEA7N Block Diagram
DK-DEV-5SGXEA7N Power Tree
DK-DEV-5SGXEA7N Power Tree No TI
Terasic DE2i-150 Cyclone IV Board
Terasic DE2i-150 Cyclone IV Board
LTC Parts List
Terasic DE2i-150 Cyclone IV Block Diagram
DE2i-150 Power Tree
Stratix V Advanced System Development Board
Stratix V Advanced System Development Board
Stratix V Advanced System Development Board Block Diagram
Stratix V Advanced Systems Development Board Power Tree

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