LTC3887
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LTC3887

具数字电源系统管理功能的双输出 PolyPhase 降压型 DC/DC 控制器

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Info : 推荐新设计使用 tooltip
Info : 推荐新设计使用 tooltip
产品详情
产品模型 24
特性
  • 订购定制编程部件
  • 符合 PMBus/I2C 标准的串行接口
    • 遥测回读包括 VIN、IIN、VOUT、IOUT、温度、占空比和故障
    • 可编程电压、电流限值、数字软起动 / 停止、排序、裕度调节、 过压 / 欠压 (OV / UV) 和频率同步 (250kHz 至 1MHz)
  • 在整个温度范围内实现 ±0.5% 的输出电压准确度
  • 集成型 16 位 ADC
  • VOUT 范围:0.5V 至 5.5V (VOUT0,VOUT1)
  • 内部 EEPROM 和具 ECC 的故障记录
  • 强大的集成型 N 沟道 MOSFET 栅极驱动器 (LTC3887)
  • 最小接通时间 45ns
  • 宽 VIN 范围:4.5V 至 24V
  • 模拟电流模式控制环路
  • 面向多相 (PolyPhase®) 应用的远端差分采样
  • 可为多达 6 个相位提供准确的 PolyPhase® 均流
  • 采用 40 引脚 (6mm x 6mm) QFN 封装
更多细节
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LTC®3887 / LTC3887-1 是一款双通道、多相 DC/DC 同步降压型开关稳压控制器,其具有一个符合基于 I2C 的 PMBus 标准之串行接口。该控制器运用了一种恒定频率、电流模式架构,此器件得到了具有图形用户界面 (GUI) 的 LTpowerPlay® 软件开发工具的支持。

开关频率、通道调相、输出电压和器件地址可采用外部配置电阻器来设置。此外,参数还可以通过数字接口来设定或存储于 EEPROM 中。电压、电流、内部 / 外部温度和故障状态则可通过总线接口来回读。

LTC3887 具有集成型栅极驱动器。LTC3887-1 有三态PWM引脚以驱动电源模块或 DrMOS 功率级。LTC3887 是 LTC3880 的增强型版本,其拥有更大的输出电压范围和更多的数字特性。更多详情请参阅第 15 页。



Applications

  • 大电流分布式电源系统
  • 电信、数据通信和存储系统
  • 智能型高效率功率调节
产品模型 24

产品技术资料帮助

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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。

参考资料

参考资料

产品型号 引脚/封装图-中文版 文档 CAD 符号,脚注和 3D模型
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软件和型号相关生态系统

软件和型号相关生态系统

评估套件

评估套件 6

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DC2454A

LTC3887EUJ-1/LTC3870EUF-1 Demo Board | Dual Phase PMBus Buck Controller with Slave Controller, 7V ≤ VIN ≤ 14V, 0.8V ≤ VOUT ≤ 1.8V @ 100A

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DC2454A

LTC3887EUJ-1/LTC3870EUF-1 Demo Board | Dual Phase PMBus Buck Controller with Slave Controller, 7V ≤ VIN ≤ 14V, 0.8V ≤ VOUT ≤ 1.8V @ 100A

LTC3887EUJ-1/LTC3870EUF-1 Demo Board | Dual Phase PMBus Buck Controller with Slave Controller, 7V ≤ VIN ≤ 14V, 0.8V ≤ VOUT ≤ 1.8V @ 100A

产品详情

演示电路 2454A 是一款高电流、高效率、三相同步降压转换器,内置双相电流模式控制器 LTC3887EUJ-1 和双相从控制器 LTC3870EUF-1。LTC3887-1 具有 PMBus 接口和电源系统管理功能。

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DC2394A

LTC3887EUJ-1 Demo Board (DCR Sense) | PMBus Buck with DrMOS, 7V ≤ VIN ≤ 14V, VOUT0/VOUT1 = 0.8V to 1.8V @ 30A

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DC2394A

LTC3887EUJ-1 Demo Board (DCR Sense) | PMBus Buck with DrMOS, 7V ≤ VIN ≤ 14V, VOUT0/VOUT1 = 0.8V to 1.8V @ 30A

LTC3887EUJ-1 Demo Board (DCR Sense) | PMBus Buck with DrMOS, 7V ≤ VIN ≤ 14V, VOUT0/VOUT1 = 0.8V to 1.8V @ 30A

产品详情

演示电路 2394A 是一款高电流、高效率、双路输出 PolyPhase® 同步降压转换器,内置双相电流模式控制器 LTC3887EUJ-1。LTC3887-1 具有 PMBus 接口和电源系统管理功能。

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DC2578A

整体电源管理:热插拔、中间总线电压、负载点(集成LTC4281、LTC3886、LTC3887、LTC2975)[需要DC1613]

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DC2578A

整体电源管理:热插拔、中间总线电压、负载点(集成LTC4281、LTC3886、LTC3887、LTC2975)[需要DC1613]

整体电源管理:热插拔、中间总线电压、负载点(集成LTC4281、LTC3886、LTC3887、LTC2975)[需要DC1613]

产品详情

DC2578A是一款完整的电源链,包括一个热插拔控制器、一个中间总线控制器和六个负载点通道,具有电源系统管理功能。该板演示如何通过LTC4281热插拔控制器和LTC3886降压中间总线控制器(IBC)安全从背板传输电源,并通过调节负载电压的负载点转换器(POL)输出。它全面展示了ADI解决方案的电源管理、协作和安全功能,并展示了如何轻松配置和管理整个电源层次结构。每个稳压电源能够进行时序控制、微调、裕量调节、监控、测量和协作响应故障,并将故障信息记录在非易失性存储器中。此外,板载负载脉冲发生器有助于优化可调LTC3886控制回路响应。整个系统提供的各种状态和遥测信息在一个GUI接口——LTpowerPlay下进行合并和呈现。

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DC1709A

LTC3880/-1 & LTC3887/-1 Demo Board I Programming Clamshell Socketed Demo Board

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DC2263A-A

LTC3887EUJ Demo Board (RSENSE) | Dual PMBus Buck, 7V ≤ VIN ≤ 18V, VOUT0/VOUT1 = 0.8V to 1.8V @ 25A

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DC2263A-A

LTC3887EUJ Demo Board (RSENSE) | Dual PMBus Buck, 7V ≤ VIN ≤ 18V, VOUT0/VOUT1 = 0.8V to 1.8V @ 25A

LTC3887EUJ Demo Board (RSENSE) | Dual PMBus Buck, 7V ≤ VIN ≤ 18V, VOUT0/VOUT1 = 0.8V to 1.8V @ 25A

产品详情

演示电路 2263A 是一款高电流、高效率、双路输出/三相同步降压转换器,内置双相电流模式控制器 LTC3887EUJ。LTC3887 具有 PMBus 接口和电源系统管理功能。DC2263A 在功率级中采用分立 MOSFET。该板的输入电压范围为 7V 至 14V。输出电压可在 0.8V 至 1.8V(1.0V 默认值)范围内进行编程,每相输出电流高达 25A。DC2263A 有两个版本:DC2263A-A 使用检测电阻并提供两个输出,而 DC2263A-B 使用 DCR 电流检测并提供双相单输出。

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DC2263A-B

LTC3887EUJ Demo Board (DCR SENSE) | 2 Phase PMBus Buck, 7V ≤ VIN ≤ 18V, VOUT = 0.8V to 1.8V @ 50A

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DC2263A-B

LTC3887EUJ Demo Board (DCR SENSE) | 2 Phase PMBus Buck, 7V ≤ VIN ≤ 18V, VOUT = 0.8V to 1.8V @ 50A

LTC3887EUJ Demo Board (DCR SENSE) | 2 Phase PMBus Buck, 7V ≤ VIN ≤ 18V, VOUT = 0.8V to 1.8V @ 50A

产品详情

Demonstration circuit 2263A is a high current, high efficiency, dual output/polyphase synchronous buck converter featuring the LTC3887EUJ, a dual-phase current mode controller. The LTC3887 has the PMBus interface and the power system management functions. The DC2263A uses discrete MOSFETs in the power stage. The input range of this board is from 7V to 14V. The output voltage can be programmed from 0.8V to 1.8V (1.0V default) with an output current up to 25A per phase. The DC2263A has two versions: The DC2263A-A uses a sense resistor and provides two outputs while the DC2263A-B uses DCR current sensing and provides a dual-phase single output.

工具和仿真

工具及仿真模型 5

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:

1步:下载并在计算机上安装LTspice

2步:单击下面的链接,下载演示电路。

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。

Linduino

Linduino是ADI公司的Arduino兼容系统,用于开发和分配面向集成电路的固件库和示例代码。每个支持Linduino的产品包括示例主程序(在LTSketchbook/产品型号文件夹中定义)和驱动程序代码(在LTSketchbook/库文件夹中定义)。

GitHub上的Linduino代码存储库以及有关如何使用代码的说明

购买Linduino

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参考电路

参考电路 4

AI XCXM1902 Minimum Rails and PL Performance

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AI XCXM1902 Minimum Rails and PL Performance

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参考设计

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AI XCXM1902 Minimum Rails and PL Performance

特性和优点

ADI Key Power Management Features for Versal PRIME XCXM1802 for Minimum Rails / PL Performance

  • Proposed Solution implements new LTC3887-1/LTC7051 combo
  • LTC3887-1 is a PMBus 2-phase, 2 loop, current mode controller. PMBus commands allow Vin, Vout, current, temperature, and fault status read back.
  • LTC7051 is new Silent Switcher 2 ADI MOS capable of delivering increased DC load while switching at higher frequencies. Increased DC load allows for decreased phase count and higher current density. Increased Fsw allows for increase bandwidth and excellent transient response.
  • LTC3636 is dual 6A, controlled on-time current mode monolithic (integrated FETs). Provides high performance compact solution for auxiliary rails.
  • LT8607 is a compact, high efficiency, high speed 750mA synchronous monolithic.
  • LTC3634 is a single chip solution for DDR rails providing VDD, VTT, and Vref in a monolithic solution.
查看参考设计详情 external link

AI XCXM1802 for Optimized Efficiency

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AI XCXM1802 for Optimized Efficiency

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参考设计

tooltip Info:参考设计
AI XCXM1802 for Optimized Efficiency

特性和优点

ADI Key Power Management Features for Versal ACAP XCXM1802 for Optimized Efficiency

  • Proposed Solution implements new LTC3887-1/LTC7051 combo
  • LTC3887-1 is a PMBus 2-phase, 2 loop, current mode controller. PMBus commands allow Vin, Vout, current, temperature, and fault status read back.
  • LTC7051 is new Silent Switcher 2 ADI MOS capable of delivering increased DC load while switching at higher frequencies. Increased DC load allows for decreased phase count and higher current density. Increased Fsw allows for increase bandwidth and excellent transient response.
  • LTC3636 is dual 6A, controlled on-time current mode monolithic (integrated FETs). Provides high performance compact solution for auxiliary rails.
  • LTC3634 is a single chip solution for DDR rails providing VDD, VTT, and Vref in a monolithic solution.
  • LTC3634 is a single chip solution for DDR rails providing VDD, VTT, and Vref in a monolithic solution.
查看参考设计详情 external link

AI XCXM1802 for Full Management Mid to High Voltage

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AI XCXM1802 for Full Management Mid to High Voltage

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参考设计

tooltip Info:参考设计
AI XCXM1802 for Full Management Mid to High Voltage

特性和优点

ADI Key Power Management Features for Versal ACAP XCXM1802 for Mid to High Voltage

  • Proposed Solution implements new LTC3887-1/LTC7051 combo
  • LTC3887-1 is a PMBus 2-phase, 2 loop, current mode controller. PMBus commands allow Vin, Vout, current, temperature, and fault status read back.
  • LTC7051 is new Silent Switcher 2 ADI MOS capable of delivering increased DC load while switching at higher frequencies. Increased DC load allows for decreased phase count and higher current density. Increased Fsw allows for increase bandwidth and excellent transient response.
  • LTC3636 is dual 6A, controlled on-time current mode monolithic (integrated FETs). Provides high performance compact solution for auxiliary rails.
  • LTC3644 is a quad 1.25A output, high efficiency synchronous monolithic capable of switching up to 2.25MHz.
  • LTC3634 is a single chip solution for DDR rails providing VDD, VTT, and Vref in a monolithic solution.
查看参考设计详情 external link
XCXM1802 Low Voltage

AI XCXM1802 for Low Voltage

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ai-xcxm1802-low-voltage

AI XCXM1802 for Low Voltage

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参考设计

tooltip Info:参考设计
AI XCXM1802 for Low Voltage

特性和优点

ADI Key Power Management Features for Versal PRIME XCXM1802 for Low Voltage

  • Proposed Solution implements new LTC3887-1/LTC7051 combo
  • LTC3887-1 is a PMBus 2-phase, 2 loop, current mode controller. PMBus commands allow Vin, Vout, current, temperature, and fault status read back.
  • LTC7051 is new Silent Switcher 2 ADI MOS capable of delivering increased DC load while switching at higher frequencies. Increased DC load allows for decreased phase count and higher current density. Increased Fsw allows for increase bandwidth and excellent transient response.
  • LTC3636 is dual 6A, controlled on-time current mode monolithic (integrated FETs). Provides high performance compact solution for auxiliary rails.
  • LTC3644 is a quad 1.25A output, high efficiency synchronous monolithic capable of switching up to 2.25MHz.
  • LTC3634 is a single chip solution for DDR rails providing VDD, VTT, and Vref in a monolithic solution.
查看参考设计详情 external link

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