TPS5431 5.5V 至 23V、3A 降压 SWIFTTM 转换器

	TPS5431
Iout(Max)(A)	3
Vin(Min)(V)	5.5
Vin(Max)(V)	23
Vout(Min)(V)	1.23
Vout(Max)(V)	20
Iq(Typ)(mA)	3
Switching Frequency(Typ)(kHz)	500
Switch Current Limit(Typ)(A)	4
Topology	Buck
Operating Temperature Range(°C)	-40 to 125
Pin/Package	8SO PowerPAD
Rating	Catalog
Duty Cycle(Max)(%)	87
Regulated Outputs(#)	1
Thermal Shutdown	Yes

TPS5431 描述

As a member of the SWIFTTM family of DC/DC regulators, the TPS5430/TPS5431 is a high-output-current PWM converter that integrates a low resistance high side N-channel MOSFET. Included on the substrate with the listed features are a high performance voltage error amplifier that provides tight voltage regulation accuracy under transient conditions; an undervoltage-lockout circuit to prevent start-up until the input voltage reaches 5.5 V; an internally set slow-start circuit to limit inrush currents; and a voltage feed-forward circuit to improve the transient response. Using the ENA pin, shutdown supply current is reduced to 18 uA typically. Other features include an active-high enable, overcurrent limiting, overvoltage protection and thermal shutdown.

TPS5431 特性

• Wide Input Voltage Range:
  • TPS5430: 5.5 V to 36 V
  • TPS5431: 5.5 V to 23 V
• Up to 3-A Continuous (4-A Peak) Output Current
• High Efficiency up to 95% Enabled by 110-mOhm Integrated MOSFET Switch
• Wide Output Voltage Range: Adjustable Down to 1.22 V with 1.5% Initial Accuracy
• Internal Compensation Minimizes External Parts Count
• Fixed 500 kHz Switching Frequency for Small Filter Size
• Improved Line Regulation and Transient Response by Input Voltage Feed Forward
• System Protected by Overcurrent Limiting, Overvoltage Protection and Thermal Shutdown
• -40°C to 125°C Operating Junction Temperature Range
• Available in Small Thermally Enhanced 8-Pin SOIC PowerPAD Package
• For SWIFTTM Documentation, Application Notes and Design Software, See the TI Website at www.ti.com/swift
• APPLICATIONS
  • Consumer: Set-top Box, DVD, LCD Displays
  • Industrial and Car Audio Power Supplies
  • Battery Chargers, High Power LED Supply
  • 12-V/24-V Distributed Power Systems

TPS5431 芯片订购指南

器件	状态	温度 (oC)	价格（美元）	封装 | 引脚	封装数量 | 封装载体	丝印标记
TPS5431DDA	ACTIVE	-40 to 125	2.05 | 1ku	SO PowerPAD (DDA) | 8	75 | TUBE	5431
TPS5431DDAG4	ACTIVE	-40 to 125	2.05 | 1ku	SO PowerPAD (DDA) | 8	75 | TUBE	5431
TPS5431DDAR	ACTIVE	-40 to 125	1.85 | 1ku	SO PowerPAD (DDA) | 8	2500 | LARGE T&R	5431
TPS5431DDARG4	ACTIVE	-40 to 125	1.85 | 1ku	SO PowerPAD (DDA) | 8	2500 | LARGE T&R	5431

TPS5431 质量与无铅数据

器件	环保计划*	铅/焊球涂层	MSL 等级/回流焊峰	环保信息与无铅 (Pb-free)	DPPM / MTBF / FIT 率
TPS5431DDA	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM		TPS5431DDA
TPS5431DDAG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	TPS5431DDAG4	TPS5431DDAG4
TPS5431DDAR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM		TPS5431DDAR
TPS5431DDARG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	TPS5431DDARG4	TPS5431DDARG4

TPS5431 应用技术支持与电子电路设计开发资源下载

1. TPS5431 数据资料 dataSheet 下载.PDF
2. TI 德州仪器非隔离式开关 DC/DC 调节器选型与价格参考 . xls
3. Dual MOSFET Driver (PDF 498 KB)
4. 全面认识开关型电源中的BUCK-BOOST功率级 (Rev. A) (PDF 2206 KB)
5. Understanding Boost Power Stages In Switchmode Power Supplies (PDF 149 KB)
6. Understanding Buck Power Stages In Switchmode Power Supplies (PDF 173 KB)
7. 标准线性产品交叉参考 (Rev. D) (PDF 1058 KB)
8. 模数规格和性能特性术语表 (Rev. A) (PDF 1993 KB)
9. 所选封装材料的热学和电学性质 (PDF 645 KB)
10. 高速数据转换 (PDF 1967 KB)

TPS5431 相关工具

名称	型号	公司	工具/软件类型
9V 至 21V 输入、3A 步降转换器	TPS5431EVM-173	Texas Instruments	开发电路板/EVM
SwitcherPro(TM) 开关电源设计工具	SWITCHERPRO	Texas Instruments	应用软件