LTC3838

推荐新设计使用

具差分输出检测功能的双通道、快速、准确的降压型 DC/DC 控制器

产品模型
8
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

  • 宽 VIN 范围:4.5V 至 38V,VOUT:0.6V 至 5.5V
  • 整个温度范围内的输出电压准确度为 ±0.67%,差分输出电压检测,在通道 1 的远端地允许高达 ±500mV 的线路损耗
  • 在独立的第二通道上提供 ±1% 输出
  • 受控接通时间、谷值电流模式控制
  • 快速负载瞬态响应
  • 瞬变检测功能 (DTR) 可抑制 VOUT 过冲
  • 频率可编程范围:200kHz 至 2MHz,可同步至外部时钟
  • tON(MIN) = 30ns,tOFF(MIN) = 90ns
  • RSENSE 或 DCR 电流检测
  • 过压保护和电流限值折返
  • 电源良好输出电压监视器
  • 输出电压跟踪和可调软启动
  • 耐热性能增强型 38 引脚 (5mm x 7mm) QFN 封装和 TSSOP 封装

 

LTC3838
具差分输出检测功能的双通道、快速、准确的降压型 DC/DC 控制器
1.2V/1.5V, 15A, 350kHz, DCR Sense, Step-Down Converter (Refer to Figure 16 for Full Design) Efficiency/Power Loss Product Package 1 Product Package 2
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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
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
数字电源系统管理器 1
LTC2974 推荐新设计使用 具有精确输出电流的4通道PMBus电源系统管理器
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


评估套件

eval board
DC1626A-B

LTC3838EFE Demo Board (RSENSE) | 4.5V ≤ VIN ≤ 26V; VOUT1 = 1.2V @ 15A, VOUT2 = 1.5V @ 15A

产品详情

Demonstration circuit 1626A is a dual output 1.5V/15A and 1.2V/15A synchronous buck converter operating with a switching frequency of 300kHz over an input voltage range of 4.5V to 26V. The demo board comes in two versions. The -A version uses inductor DCR current sensing with an iron powder inductor for high efficiency. The -B version uses a 2.5mΩ sense resistor for accurate current sensing with a low DCR ferrite inductor.



eval board
DC1626A-A

LTC3838EFE Demo Board (DCR Sense) | 4.5V ≤ VIN ≤ 26V; VOUT1 = 1.2V @ 15A, VOUT2 = 1.5V @ 15A

产品详情

Demonstration circuit 1626A is a dual output 1.5V/15A and 1.2V/15A synchronous buck converter operating with a switching frequency of 300kHz over an input voltage range of 4.5V to 26V. The demo board comes in two versions. The -A version uses inductor DCR current sensing with an iron powder inductor for high efficiency. The -B version uses a 2.5mΩ sense resistor for accurate current sensing with a low DCR ferrite inductor.



eval board
DC1801A-B

LTC3838EUHF Demo Board (RSENSE) | VIN = 4.5V to 14V, VOUT1 = 1.2V @ 20A, VOUT2 = 1.5V @ 20A

产品详情

Demonstration circuit 1801A is a dual output 1.5V/20A and 1.2V/20A synchronous buck converter operating with a switching frequency of 300kHz over an input voltage range of 4.5V to 14V. The demo board comes in two versions. The A version uses inductor DCR current sensing for high efficiency. The B version uses 2mΩ sense resistor for accurate current sensing with a low DCR ferrite inductor. The fixed on-time valley current mode topology of the LTC3838 allows for a fast load step response.

eval board
DC1801A-A

LTC3838EUHF Demo Board (DCR Sense) | VIN = 4.5V to 14V, VOUT1 = 1.2V @ 20A, VOUT2 = 1.5V @ 20A

产品详情

Demonstration circuit 1801A is a dual output 1.5V/20A and 1.2V/20A synchronous buck converter operating with a switching frequency of 300kHz over an input voltage range of 4.5V to 14V. The demo board comes in two versions. The A version uses inductor DCR current sensing for high efficiency. The B version uses 2mΩ sense resistor for accurate current sensing with a low DCR ferrite inductor. The fixed on-time valley current mode topology of the LTC3838 allows for a fast load step response.

DC1626A-B
LTC3838EFE Demo Board (RSENSE) | 4.5V ≤ VIN ≤ 26V; VOUT1 = 1.2V @ 15A, VOUT2 = 1.5V @ 15A
DC1626A-B Demo Board DC1626A-B Demo Board DC1626A-B Demo Board DC1626A-B Demo Board DC1626A-A - Schematic
DC1626A-A
LTC3838EFE Demo Board (DCR Sense) | 4.5V ≤ VIN ≤ 26V; VOUT1 = 1.2V @ 15A, VOUT2 = 1.5V @ 15A
DC1626A-A - Schematic
DC1801A-B
LTC3838EUHF Demo Board (RSENSE) | VIN = 4.5V to 14V, VOUT1 = 1.2V @ 20A, VOUT2 = 1.5V @ 20A
DC1801A-A - Schematic
DC1801A-A
LTC3838EUHF Demo Board (DCR Sense) | VIN = 4.5V to 14V, VOUT1 = 1.2V @ 20A, VOUT2 = 1.5V @ 20A
DC1801A-A - Schematic

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