LTC3850

量产

双通道路、两相同步降压型开关控制器

数据手册 (Rev. D) 产品选型表
产品模型
24
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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产品详情

  • 双通道180°相位控制器可降低所需的输入电容和电源引起的噪声
  • 高效率：高达95%
  • RSENSE或DCR电流检测
  • 0.8V输出电压精度：±1%
  • 可锁相的固定频率：250kHz至780kHz
  • 支持预偏置输出
  • 两个N沟道MOSFET同步驱动
  • 宽VIN范围：4V至24V（LTC3850I为30V）工作电压
  • 可调软启动电流斜坡或跟踪
  • 折返输出电流限制
  • 电源良好输出电压监控器
  • 28引脚4mm × 4mm、4mm × 5mm QFN和窄体SSOP封装
  • 通过AEC-Q100汽车应用认证
LTC3850
双通道路、两相同步降压型开关控制器
High Efficiency Dual 3.3V/2.5V Step-Down Converter Efficiency Product Package 1 Product Package 2 Product Package 3
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参考资料

数据手册 1

可靠性数据 1

用户手册 4

技术文章 3

了解更多
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硬件生态系统

部分模型 产品周期 描述
多个输出降压调节器 1
LTC3880
推荐新设计使用 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
硅振荡器 1
LTC6909
量产 采用扩频调制、可提供 1 至 8 个输出的多相硅振荡器
浪涌抑制器、过压和过流保护 1
LT4363
推荐新设计使用 具电流限制功能的高电压浪涌抑制器
双电源监控器 1
LTC2960
推荐新设计使用 36V、纳安级电流、两输入电压监视器
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工具及仿真模型

LTspice 2

LTspice中提供以下器件型号：

  • LTC3850
  • LTC3850-1
  • LTC3850-2

LTpowerCAD 2

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
DC1185A-A

LTC3850EUF Demo Board | 4.5V ≤ VIN ≤ 14V; VOUT1: 2V @ 10A, VOUT2: 1.8V @ 10A

立即购买 更多内容

产品详情

Demonstration circuit 1185 is a dual phase/dual output synchronous buck converter featuring the LTC3850EUF. The demo board comes in two versions. The output voltages for version -A are 2.0V/10A and 1.8V/10A and the output voltages for version -B are 1.5V/15A and 1.2V/15A. The input voltage range is 6.5V to 14V for both versions. For applications that have a 5V ±0.5V input, the board has an optional resistor to tie the INTVCC pin to the VIN pin.

eval board
schematic 2
DC1231A-A

LTC3850EGN演示板 | 6.5V < VIN < 24V，VOUT1 = 3.3V/5A，VOUT2 = 2.5V/5A

立即购买 更多内容

产品详情

演示电路1231A是一款双路输出、双相5A同步降压转换器，内置LTC3850EGN。整个电路（包括大容量输出电容）可置于所有层的1.04” × 0.94”区域内。LTC3850EGN采用28引脚窄体塑料SSOP封装。该电路板的主要特性：电源轨跟踪、用于偏置的内部5V线性稳压器、用于每路输出、PGOOD信号和模式选择器的RUN引脚，通过这些引脚该转换器可在CCM、跳脉冲或突发工作模式下工作。通过一些微小的元件变更也可与外部时钟同步。该板提供两种版本。DC-1231A-A集成用于电流反馈的片上检测电阻，DC1231A-B配置了DCR检测电路，允许转换器将电感DCR用作检测元件，而非片上检测电阻，从而节省成本和电路板空间并提高效率。


 


eval board
schematic 3
DC1231A-B

LTC3850EGN Demo Board | 6.5V < VIN < 24V, VOUT1 = 3.3V/5A, VOUT2 = 2.5V/5A, with DCR Current Sense

立即购买 更多内容

产品详情

Demonstration circuit 1231A is a Dual Output, Dual Phase 5A Synchronous Buck Converter featuring the LTC3850EGN. The entire circuit, including the bulk output capacitors, fit within a 1.04” × 0.94” area on all layers. The package style for the LTC3850EGN is a 28-lead narrow plastic SSOP. The main features of the board include rail tracking, an internal 5V linear regulator for bias, RUN pins for each output and a PGOOD signal and a Mode selector that allow the converter to run in CCM, pulse skip or Burst Mode operation. Synchronization to an external clock is also possible through some minor component changes. Two versions of the board are available. DC-1231A-A has an on-board sense resistor for current feedback, while the DC1231A-B is configured with a DCR sense circuit that allows the converter to use the inductor’s DCR as the sense element instead of the on-board sense resistors to save cost and board space and improves efficiency.


 


eval board
schematic 4
DC1126A

LTC3850EUF Demo Board | 6.5V ≤ VIN ≤ 14V, VOUT = 3.3V @ 5A & 2.5V @ 5A

立即购买 更多内容

产品详情

Demonstration circuit 1126 is a high density dual output (3.3V/5A and 2.5V/5A) step down converter featuring the LTC3850EUF. The input voltage range is 6.5V to 14V. For applications that have a 5V +/- 0.5V input, the board has an optional resistor to tie the INTVCC pin to the VIN pin.


An optional DCR sense circuit allows the converter to use the inductor’s DCR as the sense element instead of the on-board sense resistors to save cost and board space and to improve efficiency.


 


eval board
schematic 5
DC1185B-B

LTC3850EUF Demo Board | 4.5V ≤ VIN ≤ 14V; VOUT1: 1.5V @ 15A, VOUT2: 1.2V @ 15A

立即购买 更多内容

产品详情

Demonstration circuit 1185 is a dual phase/dual output synchronous buck converter featuring the LTC3850EUF. The demo board comes in two versions. The output voltages for version -A are 2.0V/10A and 1.8V/10A and the output voltages for version -B are 1.5V/15A and 1.2V/15A. The input voltage range is 6.5V to 14V for both versions. For applications that have a 5V ± 0.5V input, the board has an optional resistor to tie the INTVCC pin to the VIN pin.

eval board
schematic 6
DC1185B-A

LTC3850EUF Demo Board | 4.5V ≤ VIN ≤ 14V; VOUT1: 2V @ 10A, VOUT2: 1.8V @ 10A

立即购买 更多内容

产品详情

Demonstration circuit 1185 is a dual phase/dual output synchronous buck converter featuring the LTC3850EUF. The demo board comes in two versions. The output voltages for version -A are 2.0V/10A and 1.8V/10A and the output voltages for version -B are 1.5V/15A and 1.2V/15A. The input voltage range is 6.5V to 14V for both versions. For applications that have a 5V ±0.5V input, the board has an optional resistor to tie the INTVCC pin to the VIN pin.
DC1185A-A
LTC3850EUF Demo Board | 4.5V ≤ VIN ≤ 14V; VOUT1: 2V @ 10A, VOUT2: 1.8V @ 10A
DC1185A-A - Schematic
DC1231A-A
LTC3850EGN演示板 | 6.5V < VIN < 24V，VOUT1 = 3.3V/5A，VOUT2 = 2.5V/5A
DC1231A-A - Schematic
DC1231A-B
LTC3850EGN Demo Board | 6.5V < VIN < 24V, VOUT1 = 3.3V/5A, VOUT2 = 2.5V/5A, with DCR Current Sense
DC1231A-A - Schematic
DC1126A
LTC3850EUF Demo Board | 6.5V ≤ VIN ≤ 14V, VOUT = 3.3V @ 5A & 2.5V @ 5A
DC1126A - Schematic
DC1185B-B
LTC3850EUF Demo Board | 4.5V ≤ VIN ≤ 14V; VOUT1: 1.5V @ 15A, VOUT2: 1.2V @ 15A
DC1185B-A - Schematic
DC1185B-A
LTC3850EUF Demo Board | 4.5V ≤ VIN ≤ 14V; VOUT1: 2V @ 10A, VOUT2: 1.8V @ 10A
DC1185B-A - Schematic

参考电路

DK-DEV-4CGX150N FPGA Development Kit
DK-DEV-4CGX150N FPGA Development Kit
DK-DEV-4CGX150N Block Diagram
DK-DEV-4CGX150N Power Tree
Altera Cyclone IV 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
Altera Cyclone IV GX FPGA Development Kit
DK-DEV-4CGX150N FPGA Development Kit
DK-DEV-4CGX150N Block Diagram
DK-DEV-4CGX150N Power Tree

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