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AC/DC 和 DC/DC 转换器（集成 FET）

TPS54425

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4.5V 至 18V 输入、4A 同步降压转换器

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TPS54425

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产品详情

Rating Catalog Operating temperature range (°C) -40 to 85 Topology Buck Type Converter Iout (max) (A) 4 Vin (min) (V) 4.5 Vin (max) (V) 18 Switching frequency (min) (kHz) 700 Switching frequency (max) (kHz) 700 Features Enable, Power good, Soft Start Adjustable, Synchronous Rectification Control mode D-CAP2 Vout (min) (V) 0.76 Vout (max) (V) 5.5 Iq (typ) (µA) 850 Duty cycle (max) (%) 90
Rating Catalog Operating temperature range (°C) -40 to 85 Topology Buck Type Converter Iout (max) (A) 4 Vin (min) (V) 4.5 Vin (max) (V) 18 Switching frequency (min) (kHz) 700 Switching frequency (max) (kHz) 700 Features Enable, Power good, Soft Start Adjustable, Synchronous Rectification Control mode D-CAP2 Vout (min) (V) 0.76 Vout (max) (V) 5.5 Iq (typ) (µA) 850 Duty cycle (max) (%) 90
HTSSOP (PWP) 14 32 mm² 5 x 6.4
  • D-CAP2™ Mode Enables Fast Transient Response
  • Low Output Ripple and Allows Ceramic Output Capacitor
  • Wide VIN Input Voltage Range: 4.5 V to 18 V
  • Output Voltage Range: 0.76 V to 5.5 V
  • Highly Efficient Integrated FET’s Optimized
    for Lower Duty Cycle Applications
    – 65 mΩ (High Side) and 55 mΩ (Low Side)
  • High Efficiency, less than 10 µA at shutdown
  • High Initial Bandgap Reference Accuracy
  • Adjustable Soft Start
  • Pre-Biased Soft Start
  • 700-kHz Switching Frequency (fSW)
  • Cycle By Cycle Over Current Limit
  • Power Good Output
  • APPLICATIONS
    • Wide Range of Applications for Low Voltage System
      • Digital TV Power Supply
      • High Definition Blu-ray Disc Players
      • Networking Home Terminal
      • Digital Set Top Box (STB)
  • D-CAP2™ Mode Enables Fast Transient Response
  • Low Output Ripple and Allows Ceramic Output Capacitor
  • Wide VIN Input Voltage Range: 4.5 V to 18 V
  • Output Voltage Range: 0.76 V to 5.5 V
  • Highly Efficient Integrated FET’s Optimized
    for Lower Duty Cycle Applications
    – 65 mΩ (High Side) and 55 mΩ (Low Side)
  • High Efficiency, less than 10 µA at shutdown
  • High Initial Bandgap Reference Accuracy
  • Adjustable Soft Start
  • Pre-Biased Soft Start
  • 700-kHz Switching Frequency (fSW)
  • Cycle By Cycle Over Current Limit
  • Power Good Output
  • APPLICATIONS
    • Wide Range of Applications for Low Voltage System
      • Digital TV Power Supply
      • High Definition Blu-ray Disc Players
      • Networking Home Terminal
      • Digital Set Top Box (STB)

The TPS54425 is an adaptive on-time D-CAP2™ mode synchronous buck converter. The TPS54425 enables system designers to complete the suite of various end equipment’s power bus regulators with a cost effective, low component count, low standby current solution. The main control loop for the TPS54425 uses the D-CAP2 mode control which provides a very fast transient response with no external compensation components. The TPS54425 also has a proprietary circuit that enables the device to adopt to both low equivalent series resistance (ESR) output capacitors, such as POSCAP or SP-CAP, and ultra-low ESR ceramic capacitors. The device operates from 4.5-V to 18-V VIN input. The output voltage can be programmed between 0.76 V and 5.5 V. The device also features an adjustable soft start time and a power good function. The TPS54425 is available in the 14-pin HTSSOP package, and designed to operate from –40°C to 85°C.

The TPS54425 is an adaptive on-time D-CAP2™ mode synchronous buck converter. The TPS54425 enables system designers to complete the suite of various end equipment’s power bus regulators with a cost effective, low component count, low standby current solution. The main control loop for the TPS54425 uses the D-CAP2 mode control which provides a very fast transient response with no external compensation components. The TPS54425 also has a proprietary circuit that enables the device to adopt to both low equivalent series resistance (ESR) output capacitors, such as POSCAP or SP-CAP, and ultra-low ESR ceramic capacitors. The device operates from 4.5-V to 18-V VIN input. The output voltage can be programmed between 0.76 V and 5.5 V. The device also features an adjustable soft start time and a power good function. The TPS54425 is available in the 14-pin HTSSOP package, and designed to operate from –40°C to 85°C.
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技术文档

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类型 标题 下载最新的英语版本 日期
* 数据表 4-A Output Single Synchronous Step Down Switcher With Integrated FET (SWIFT) 数据表 (Rev. C) 2011年 7月 25日
用户指南 TPS54425 Step-Down Converter Evaluation Module User's Guide (Rev. A) PDF | HTML 2021年 9月 2日
应用手册 基于带有纹波注入谷底检测定导通时间频域分析的D-CAP2™频率响应模型 英语版 2015年 9月 2日
设计指南 适用于 Xilinx FPGA 的模拟器件 解决方案指南 2012年 4月 24日
应用手册 Understanding Thermal Dissipation and Design of a Heatsink 2011年 5月 4日

设计和开发

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评估板

TPS54425EVM-608 — 用于 TPS54425 4.5V 至 18V 输入、4A 同步降压转换器的评估模块

TPS54425EVM-608 是一块完全组装且经过测试的电路板，用于评估 TPS54425 同步降压 SWIFT™ 转换器。TPS54425EVM-608 由 4.5V 至 18V 输入电压供电，在电流为 4A 时提供 1.05V 的输出电压。
用户指南: PDF | HTML
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仿真模型

TPS54425 TINA-TI Transient Reference Design

SLIM294.TSC (184 KB) - TINA-TI Reference Design
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仿真模型

TPS54425 TINA-TI Transient Spice Model

SLIM295.ZIP (41 KB) - TINA-TI Spice Model
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仿真模型

TPS54425 Unencrypted PSpice Transient Model Package (Rev. A)

SLIM290A.ZIP (41 KB) - PSpice Model
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参考设计

TIDA-010011 — 适用于保护继电器处理器模块的高效电源架构参考设计

This reference design showcases various power architectures for generating multiple voltage rails for an application processor module, requiring >1A load current and high efficiency . The required power supply is generated using 5-, 12- or 24-V DC input from the backplane. Power supplies are (...)
原理图: PDF
参考设计

PMP6776 — Xilinx Kintex 7 Low Cost reference design

PMP6776 是低成本非隔离型同步降压电源。此设计使用 TPS56121 和 TPS54620 同步降压转换器以及 TPS54425 和 TPS54225 降压开关产生 7 个输出。其功能包括：输入电压范围为 10.8V 至 13.2V，输出为 6A 下 1V、4A 下 1.5V、6A 下 1.8V、2A 下 2V、8A 下 2.5V、8A 下 3.3V、4A 下 1.2V。
测试报告: PDF
原理图: PDF
封装 引脚 CAD 符号、封装和 3D 模型
HTSSOP (PWP) 14 Ultra Librarian
应遵守 TI 评估类商品的标准条款与条件。

订购和质量

包含信息：
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 鉴定摘要
  • 持续可靠性监测
包含信息：
  • 制造厂地点
  • 封装厂地点

支持和培训

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