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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推荐新设计使用

顶部

新产品 (2)

电子书

Understanding Silent Switcher Technology: High Efficiency, Low EMI eBook

解决方案通报和手册

Silent Switcher Technology

概览

优势和特点
产品详情

优势和特点

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^®)，I_Q为40µA
可在过载情况下安全地承受电感饱和
V_IN 范围：2.25V至5.5V
V_OUT 范围：0.5V至 V_IN
V_OUT 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

产品详情

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

产品分类

电源管理

领域

医疗健康 (3)

产品生命周期推荐新设计使用

本产品已上市。数据手册包含所有最终性能规格和工作条件。ADI公司推荐新设计使用这些产品。

评估套件 (1)

DC2990A

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

DC2990A

查看此评估套件详细信息

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 V_IN 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 V_IN to low V_OUT 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 V_IN 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 V_IN 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.

参考资料

数据手册

LTC3307A: 5V, 3A Synchronous Step-Down Silent Switcher in 2mm x 2mm LQFN Data Sheet (Rev. C)
1/18/2021
PDF

可靠性数据

R523 Reliability Data
4/13/2020
PDF

用户手册

DC2990A - Demo Manual
2/3/2020
PDF

在线研讨会

Improving Switch-Mode Power Supplies Using Noise Cancelling Technology
2/8/2023

电子书

Understanding Silent Switcher Technology: High Efficiency, Low EMI eBook
7/14/2023
PDF

解决方案通报和手册

Silent Switcher Technology
8/15/2023
PDF

技术文章

电源小型化
4/25/2022
小尺寸高功率密度
10/1/2019 模拟对话

非常见问题解答

非常见问题第191期：负载点DC-DC转换器解决电压精度、效率和延迟问题
7/1/2021

工具及仿真模型

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。

下载 LTspice 文档

LTspice中提供以下器件型号：

LTC3307A

LTC3307B

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。

如要打开此电路的项目文件，请执行以下操作：

第1步：下载并在计算机上安装LTpowerCAD。

第2步：单击下面的链接，下载特定器件项目文件。

第3步：如果项目文件不运行，请右键单击该链接并选择“目标另存为”。然后启动LTpowerCAD工具，并从“文件”菜单中选择“打开项目”即可打开项目文件。

LTpowerCAD下载和文档

LTpowerCAD项目文件

LTC3307A Project - 3-5Vin to 1.2V/3A, 2MHz

LTpowerCAD中提供以下器件的设计工具：

LTC3307A

LTC3307B

参考电路 (2)

Knightrider Zynq Ultrascale+ MPSOC

Automotive ASIL-D Compliant Power Delivery Board

Artix UltraScale+

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

Knightrider Zynq Ultrascale+ MPSOC

Automotive ASIL-D Compliant Power Delivery Board

Knightrider Zynq Ultrascale+ MPSOC

Automotive ASIL-D Compliant Power Delivery Board

查看此参考电路详细信息

优势和特点

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

所用产品

Artix UltraScale+

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

Artix UltraScale+

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

查看此参考电路详细信息

优势和特点

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)

所用产品

设计资源

ADI始终把满足您可靠性水平的产品放在首要位置。我们通过在所有产品、工艺设计和制造过程中引入高质量和可靠性检查实践这一承诺。发运的产品实现“零缺陷”始终是我们的目标。

Part Number	Material Declaration	Reliability Data	Pin/Package Drawing	CAD Symbols, Footprints & 3D Models
LTC3307AACBZ-R7	材料声明	质量和可靠性	CHIPS W/SOLDER BUMPS/WLCSP	Ultra Librarian SamacSys
LTC3307AEV#TRMPBF	材料声明	质量和可靠性	12-Lead LQFN (2mm x 2mm x 0.74mm)	Ultra Librarian SamacSys
LTC3307AEV#TRPBF	材料声明	质量和可靠性	12-Lead LQFN (2mm x 2mm x 0.74mm)	Ultra Librarian SamacSys
LTC3307AEV#WTRMPBF	材料声明	质量和可靠性	12-Lead LQFN (2mm x 2mm x 0.74mm)	Ultra Librarian SamacSys
LTC3307AEV#WTRPBF	材料声明	质量和可靠性	12-Lead LQFN (2mm x 2mm x 0.74mm)	Ultra Librarian SamacSys
LTC3307AHV#TRMPBF	材料声明	质量和可靠性	12-Lead LQFN (2mm x 2mm x 0.74mm)	Ultra Librarian SamacSys
LTC3307AHV#TRPBF	材料声明	质量和可靠性	12-Lead LQFN (2mm x 2mm x 0.74mm)	Ultra Librarian SamacSys
LTC3307AHV#WTRMPBF	材料声明	质量和可靠性	12-Lead LQFN (2mm x 2mm x 0.74mm)	Ultra Librarian SamacSys
LTC3307AHV#WTRPBF	材料声明	质量和可靠性	12-Lead LQFN (2mm x 2mm x 0.74mm)	Ultra Librarian SamacSys
LTC3307AIV#TRMPBF	材料声明	质量和可靠性	12-Lead LQFN (2mm x 2mm x 0.74mm)	Ultra Librarian SamacSys
LTC3307AIV#TRPBF	材料声明	质量和可靠性	12-Lead LQFN (2mm x 2mm x 0.74mm)	Ultra Librarian SamacSys
LTC3307AIV#WTRMPBF	材料声明	质量和可靠性	12-Lead LQFN (2mm x 2mm x 0.74mm)	Ultra Librarian SamacSys
LTC3307AIV#WTRPBF	材料声明	质量和可靠性	12-Lead LQFN (2mm x 2mm x 0.74mm)	Ultra Librarian SamacSys
LTC3307AJV#TRMPBF	材料声明	质量和可靠性	12-Lead LQFN (2mm x 2mm x 0.74mm)	Ultra Librarian SamacSys
LTC3307AJV#TRPBF	材料声明	质量和可靠性	12-Lead LQFN (2mm x 2mm x 0.74mm)	Ultra Librarian SamacSys
LTC3307AJV#WTRMPBF	材料声明	质量和可靠性	12-Lead LQFN (2mm x 2mm x 0.74mm)	Ultra Librarian SamacSys
LTC3307AJV#WTRPBF	材料声明	质量和可靠性	12-Lead LQFN (2mm x 2mm x 0.74mm)	Ultra Librarian SamacSys
LTC3307AMPV#TRMPBF	材料声明	质量和可靠性	12-Lead LQFN (2mm x 2mm x 0.74mm)	Ultra Librarian SamacSys
LTC3307AMPV#TRPBF	材料声明	质量和可靠性	12-Lead LQFN (2mm x 2mm x 0.74mm)	Ultra Librarian SamacSys
Wafer Fabrication Data		R523 Reliability Data

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