LTC3307A
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LTC3307A

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

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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
特性
  • 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
更多细节
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LTC3307A是一款非常小巧、高效率、低噪声、单片同步3A降压型DC/DC转换器,采用2.25V至5.5V输入电源。该稳压器在1MHz至3MHz的开关频率下使用恒定频率峰值电流模式控制,最小导通时间低至22 ns,可通过小型外部元件实现快速瞬态响应。Silent Switcher架构可较大程度地降低EMI辐射。

LTC3307A可在强制连续或脉冲跳跃模式下工作以实现低噪声,或在低纹波突发模式下工作以在轻负载条件时实现高效率,适用于电池供电系统。该IC可将输出电压调节到最低500mV。其他特性包括输出过压保护、短路保护、热关断、时钟同步以及高达100%占空比运行以实现低压差。该器件采用薄型12引脚 2mm×2mm×0.74mm LQFN封装,并带有裸焊盘以降低热阻。

应用

  • 光网络、服务器、电信
  • 汽车、工业、通信
  • 分布式直流电源系统(POL)
  • FPGA、ASIC、微处理器内核电源
  • 电池供电系统

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

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LTC3307AACBZ-R7
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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 2

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DC2990A

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

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DC2990A

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

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

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.

工具和仿真

工具及仿真模型 2

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。

参考电路

参考电路 2

Knightrider Zynq Ultrascale +MPSOC Automotive Power Delivery Board​ - Top View

Automotive ASIL-D Compliant Power Delivery Board

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Automotive ASIL-D Compliant Power Delivery Board

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参考设计

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Automotive ASIL-D Compliant Power Delivery Board

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
查看参考设计详情 external link
Artix US+ Rail Consolidation – Minimum Rails (AU10P/15P) Power Tree

Minimum Rails for AU10/15P and AU20/25P - Non-Hardware Verified Design

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Minimum Rails for AU10/15P and AU20/25P - Non-Hardware Verified Design

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参考设计

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Minimum Rails for AU10/15P and AU20/25P - Non-Hardware Verified Design

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)
查看参考设计详情 external link
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