LTC3307A

推荐新设计使用

采用 2 mm x 2 mm LQFN 封装的 5 V、3 A 同步降压型 Silent Switcher

数据手册 (Rev. E) 产品选型表
产品模型
19
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

  • 与LTC3308(4A)和LTC3309(6A)引脚兼容
  • 高效率：8mΩ NMOS，31mΩ PMOS
  • 可编程频率：1MHz - 3MHz
    • 小型电感和电容
  • 峰值电流模式控制
    • 22ns最短导通时间
    • 宽带宽、快速瞬态响应
  • Silent Switcher® 架构
    • 低EMI辐射
  • 低纹波突发工作模式(Burst Mode®)，IQ为40µA
  • 可在过载情况下安全地承受电感饱和
  • VIN 范围：2.25V至5.5V
  • VOUT 范围：0.5V至 VIN
  • VOUT 精度：±1%(全温度范围)
  • 精准400mV使能阈值，关断时1µA
  • 电源良好指示、内部补偿和软启动
  • 散热增强型12引脚2mm × 2mm LQFN封装和16引脚1.64mm × 1.64mm WLCSP封装
  • 通过AEC-Q100汽车应用认证
LTC3307A
采用 2 mm x 2 mm LQFN 封装的 5 V、3 A 同步降压型 Silent Switcher
LTC3307A Application Circuit LTC3307A Performance Graph LTC3307A Pin Configuration
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参考资料

数据手册 1

可靠性数据 1

用户手册 2

技术文章 1

了解更多
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工具及仿真模型

LTspice 1

LTspice中提供以下器件型号：

  • LTC3307A
  • LTC3307B

LTpowerCAD 1

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
schematic 2
schematic 3
DC2990A

LTC3307A | 5V Input to 1.2V Output at 3A Synchronous Step‑Down Silent Switcher Demo Circuit

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产品详情

Demonstration circuit 2990A features the LTC3307A 5V, 3A synchronous step-down Silent Switcher® operating as a 2MHz, 3.3V to 1.2V 3A buck regulator. The LTC3307A supports adjustable output voltages from 0.5V to VIN with operating frequencies from 1MHz up to 3MHz. The LTC3307A is a compact, ultralow emission, high efficiency, and high speed synchronous monolithic step-down switching regulator. A minimum on-time of 22ns enables high VIN to low VOUT conversion ratios at high frequencies.

The DC2990A operating mode may be selected as Burst, Skip or forced continuous (FC) mode. Setting JP1 to the FC/SYNC position will allow the LTC3307A to sync to a clock frequency from 1MHz to 3MHz. The LTC3307A operates in forced continuous mode when syncing to an external clock. The DC2990A is set to a fixed 2MHz frequency by connecting RT to VIN through a 0Ω resistor, R9. The frequency can be easily changed by removing R9 and setting an appropriate resistor in the R4 location to obtain the desired frequency. Refer to the LTC3307A data sheet for the proper RT value for a desired switching frequency.

The DC2990A also has an EMI filter to reduce conducted EMI. This EMI filter can be included by applying the input voltage at the VIN EMI terminal. The EMI performance of the board is shown in the EMI Test Results section. The red lines in the EMI performance graphs illustrate the CISPR25 Class 5 peak limits for the conducted and radiated emission tests.

The LTC3307A data sheet gives a complete description of the device, operation and application information. The data sheet must be read in conjunction with this demo manual. The LTC3307A is assembled in a 2mm × 2mm LQFN package with exposed pads for low thermal resistance. The layout recommendations for low EMI operation and maximum thermal performance are available in the data sheet section Low EMI PCB Layout.

The Efficiency vs Load graph shows the efficiency and the power loss of the circuit with a 3.3V input in Burst Mode operation.
DC2990A
LTC3307A | 5V Input to 1.2V Output at 3A Synchronous Step‑Down Silent Switcher Demo Circuit
DC2990A DC2990A DC2990A
DC3122A
DC3122A Evaluation Board DC3122A Evaluation Board - Top View DC3122A Evaluation Board - Bottom View

参考电路

Artix US+ Rail Consolidation – Minimum Rails (AU10P/15P) Power Tree
Artix US+ Rail Consolidation – Minimum Rails (AU10P/15P) Power Tree
Artix US+ Rail Consolidation - Minimum Rails (AU20P/25P) Power Tree
Artix UltraScale+ 参考设计

用于AU10/15P和AU20/25P的最低供电轨——非硬件验证设计

查看参考设计详情

特性和优点

  • Xilinx Artix® UltraScale+™ devices are the industry’s only cost-optimized FPGAs based on an advanced, production-proven 16nm architecture for best-in-class performance/watt.

  • Analog Devices, Inc. supports power delivery solutions for the Artix Ultrascale+ low-cost designs. Monolithic solutions are used to power Xilinx FPGA and/or SoC rails as well as other system rails. These regulators are highly integrated discrete solutions optimized for cost, efficiency and footprint.

  • ADI provides supporting documentation including power schematics, layout, LTpowerPlanner® and applicable LTpowerPlay® configuration files to enable you to validate the power solution for your application seamlessly.

  • For a complete list power designs and use cases, please contact your local FAE.

  • Key Power for full management devices are used as follows:

    • LTC3307A
    • LTC3309A
    • ADP125
    • LTC3617 (Optional DDR)
    • LTC3618
    • ADM1186 (Optional Monitoring & Sequencing)
Knightrider Zynq Ultrascale +MPSOC Automotive Power Delivery Board​ - Top View
Knightrider Zynq Ultrascale +MPSOC Automotive Power Delivery Board​ - Top View
Knightrider Zynq Ultrascale +MPSOC Automotive Power Delivery Board​ - Bottom View
Knightrider Zynq Ultrascale +MPSOC Power Tree
Knightrider Zynq Ultrascale+ MPSOC 参考设计

Automotive ASIL-D Compliant Power Delivery Board

查看参考设计详情

特性和优点

Xilinx Zynq® UltraScale+™ devices are the industry’s only cost-optimized FPGAs based on an advanced, production-proven 16nm architecture for best-in-class performance/watt.

Analog Devices, Inc. supports ASIL-D compliant automotive power delivery solutions for the Xilinx Zynq UltraScale+ MPSOC. The Knightrider board demonstrates the best-in-class power management supporting ASIL-D compliant solutions for functional safety.

Monolithic solutions are used to power Xilinx FPGA and/or SoC rails as well as other system rails. These regulators are highly integrated discrete solutions optimized for cost, efficiency and foot print.

ADI provides supporting documentation including power schematics, layout, LTpowerPlanner® and applicable LTpowerPlay® configuration files to enable you to validate the power solution for your application seamlessly.

For a complete list power designs and use cases, please contact your local FAE.

Key Power for full management devices are used as follows:

  • LT8672
  • LTC4365
  • MAX20410
  • MAX20478
  • MAX20438
  • LTC3307
  • MAX25229
  • MAX17510
Artix UltraScale+
用于AU10/15P和AU20/25P的最低供电轨——非硬件验证设计
Artix US+ Rail Consolidation – Minimum Rails (AU10P/15P) Power Tree
Artix US+ Rail Consolidation - Minimum Rails (AU20P/25P) Power Tree
Knightrider Zynq Ultrascale+ MPSOC
Automotive ASIL-D Compliant Power Delivery Board
Knightrider Zynq Ultrascale +MPSOC Automotive Power Delivery Board​ - Top View
Knightrider Zynq Ultrascale +MPSOC Automotive Power Delivery Board​ - Bottom View
Knightrider Zynq Ultrascale +MPSOC Power Tree

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