LTC3612

量产

3A、4MHz 单片同步降压型 DC/DC 转换器

数据手册 (Rev. D) 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

  • 3A 输出电流
  • 2.25V 至 5.5V 输入电压范围
  • 低输出纹波 Burst Mode® 运行：IQ = 70μA
  • ±输出电压精度为 1％
  • 输出电压低达 0.6V
  • 高效率：高达 95%
  • 低压差运行：100% 占空比
  • 关断电流：≤1μA
  • 可调开关频率：高达 4MHz
  • 可编程的软启动
  • 具有内部补偿功能的可选有源电压定位（AVP）
  • 具有可调脉冲钳位的可选脉冲跳跃/强制连续/Burst Mode 运行
  • 用于启动跟踪或外部参考的输入
  • DDR内存模式，IOUT = ±1.5A
  • 采用耐热性能增强型 20 引脚  (3mm × 4mm) QFN 和 TSSOP 封装
  • 符合汽车应用的 AEC-Q100 标准

LTC3612是一款采用电流模式、恒频架构的低静态电流单芯片同步降压型稳压器。休眠模式下的空载直流电源电流仅70μA，同时在空载时保持输出电压（突发工作模式），关断时电流降至零。LTC3612的输入电源电压范围为2.25V至5.5V，非常适合单节锂离子电池以及固定低电压输入应用。100％占空比能力支持低压差工作模式，从而延长了电池供电系统的工作时间。

工作频率可在外部编程至4MHz，支持小型表面贴装电感。对于开关噪声敏感型应用，LTC3612可以与高达4MHz的外部时钟同步。

LTC3612提供强制连续工作模式，可降低噪声和RF干扰。可调补偿功能可针对各种负载和输出电容优化瞬态响应。

内部同步开关提高了效率，并且无需外部续流二极管，从而节省了外部组件和电路板空间。LTC3612采用无引线20引脚、3mm × 4mm QFN封装，或耐热性能增强型、20引脚TSSOP封装。

应用

  • 负载点电源
  • 分布式电源
  • 便携式计算机系统
  • DDR存储器端接
  • 手持式设备
LTC3612
3A、4MHz 单片同步降压型 DC/DC 转换器
LTC3612 Application Circuit LTC3612 Pin Configuration LTC3612 Pin Configuration LTC3612 Performance Graph
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参考资料

数据手册 1

可靠性数据 1

用户手册 2

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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 1
LTC4365
推荐用于新设计 欠压、过压和电源反向保护控制器
电源系统管理(PSM)和时序控制器 1
LTC2974
推荐用于新设计 具有精确输出电流的4通道PMBus电源系统管理器
监控电路和复位器IC 1
LTC2935
量产 具电源故障输出、可选门限的超低功率监控器
开关稳压器和控制器 1
LTC3880
推荐用于新设计 具有数字电源系统管理功能的双输出 PolyPhase 降压型 DC/DC控制器
Modal heading
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工具及仿真模型

LTspice 1

LTspice中提供以下器件型号：

  • LTC3612

LTpowerCAD 2

LTpowerCAD中提供以下器件的设计工具：

  • LTC3612
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。

LTpowerCAD

LTpowerCAD®是一种电源设计程序，它选择功率级元件，提供详细效率信息，显示快速环路波特图稳定性和负载瞬态分析，并可导出至LTspice进行仿真。

评估套件

eval board
schematic 1
DC1310A

LTC3612EUDC Demo Board | 3A, 4MHz, Monolithic Synchronous Step-Down Regulator, QFN-20 Pkg

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产品详情

Demo Circuit 1310 is a high efficiency, high frequency step-down converter, incorporating the LTC3612 monolithic synchronous regulator. The DC1310A has an input voltage range of 2.25V to 5.5V, and is capable of delivering up to 3A of output current. The output voltage of the DC1310A can be set as low as 0.6V, the reference voltage of the LTC3612. The operating frequency range of the DC1310A is either set to a fixed 2.25 MHz by connecting the frequency pin to SVin, set by an external resistor, or synchronized to an external clock, with a range up to 4 MHz. At low load currents, the DC1310A can operate in either noise sensitive applications, due to the capability of the LTC3612 to operate in pulse-skipping mode, or in high efficiency applications, because the LTC3612 also has Burst-Mode capability.

 

eval board
schematic 2
DC1574A

LTC3612EFE Demo Board | 3A, 4MHz, Monolithic Synchronous Step-Down Regulator, TSSOP-16E Pkg

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产品详情

Demo Circuit 1574 is a high efficiency, high frequency step-down converter, incorporating the LTC3612 monolithic synchronous regulator. The DC1574A has an input voltage range of 2.25V to 5.5V, and is capable of delivering up to 3A of output current. The output voltage of the DC1574A can be set as low as 0.6V, the reference voltage of the LTC3612. The operating frequency range of the DC1574A is either set to a fixed 2.25 MHz by connecting the frequency pin to SVIN, set by an external resistor, or synchronized to an external clock, with a range up to 4 MHz. At low load currents, the DC1574A can operate in either noise sensitive applications, due to the capability of the LTC3612 to operate in pulse-skipping mode, or in high efficiency applications, because the LTC3612 also has Burst-Mode capability. The Burst Mode clamp can be set externally.
DC1310A
LTC3612EUDC Demo Board | 3A, 4MHz, Monolithic Synchronous Step-Down Regulator, QFN-20 Pkg
DC1310A - Schematic
DC1574A
LTC3612EFE Demo Board | 3A, 4MHz, Monolithic Synchronous Step-Down Regulator, TSSOP-16E Pkg
DC1574A - Schematic

参考电路

MAX 10 NEEK Dev Kit
MAX 10 NEEK Dev Kit
MAX 10 NEEK Block Diagram
MAX 10 NEEK Power Tree
MAX 10 NEEK 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
DE0 Nano SoC Dev Platform - Top View
DE0 Nano SoC Dev Platform - Top View
DE0 Nano SoC Dev Platform - Bottom View
DE0 Nano SoC Block Diagram
DE0 Nano SoC Power Tree
Terasic DE0-Nano-SoC Kit / Atlas-SoC 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
DE-10 Nano Kit
DE-10 Nano Kit
DE-10 Nano Kit Block Diagram
DE-10 Nano Power Tree
Terasic DE10-Nano 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
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
MAX 10 NEEK Development Kit
MAX 10 NEEK Dev Kit
MAX 10 NEEK Block Diagram
MAX 10 NEEK Power Tree
Terasic DE0-Nano-SoC Kit / Atlas-SoC Kit
DE0 Nano SoC Dev Platform - Top View
DE0 Nano SoC Dev Platform - Bottom View
DE0 Nano SoC Block Diagram
DE0 Nano SoC Power Tree
Terasic DE10-Nano Kit
DE-10 Nano Kit
DE-10 Nano Kit Block Diagram
DE-10 Nano 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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