TPS54426

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具有 Eco-Mode? 的 4.5V 至 18V 輸入、4A 同步降壓轉換器

產品詳情

Rating Catalog Topology Buck Iout (max) (A) 4 Vin (max) (V) 18 Vin (min) (V) 4.5 Vout (max) (V) 5.5 Vout (min) (V) 0.76 Features Enable, Light-load efficiency, Power good, Soft-start adjustable, Synchronous rectification Control mode D-CAP2 Switching frequency (min) (kHz) 700 Switching frequency (max) (kHz) 700 Operating temperature range (°C) -40 to 85 Iq (typ) (μA) 850 Duty cycle (max) (%) 90 Type Converter
Rating Catalog Topology Buck Iout (max) (A) 4 Vin (max) (V) 18 Vin (min) (V) 4.5 Vout (max) (V) 5.5 Vout (min) (V) 0.76 Features Enable, Light-load efficiency, Power good, Soft-start adjustable, Synchronous rectification Control mode D-CAP2 Switching frequency (min) (kHz) 700 Switching frequency (max) (kHz) 700 Operating temperature range (°C) -40 to 85 Iq (typ) (μA) 850 Duty cycle (max) (%) 90 Type Converter
HTSSOP (PWP) 14 32 mm2 5 x 6.4 VQFN (RSA) 16 16 mm2 4 x 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
  • Auto-Skip Eco-mode for High Efficiency at Light Load
  • 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
  • Auto-Skip Eco-mode for High Efficiency at Light Load
  • 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 TPS54426 is an adaptive on-time D-CAP2™ mode synchronous buck converter. The TPS54426 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 TPS54426 uses the D-CAP2™ mode control which provides a very fast transient response with no external compensation components. The adaptive on-time control supports seamless transition between PWM mode at higher load conditions and Eco-mode™ operation at light loads. Eco-mode™ allows the TPS54426 to maintain high efficiency during lighter load conditions. The TPS54426 also has a proprietary circuit that enables the device to adopt to both low equivalent series resistance (ESR) output capacitors, such as POSCAP, 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 TPS54426 is available in the 14-pin HTSSOP package and the 16 pin QFN package, designed to operate from –40°C to 85°C.

The TPS54426 is an adaptive on-time D-CAP2™ mode synchronous buck converter. The TPS54426 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 TPS54426 uses the D-CAP2™ mode control which provides a very fast transient response with no external compensation components. The adaptive on-time control supports seamless transition between PWM mode at higher load conditions and Eco-mode™ operation at light loads. Eco-mode™ allows the TPS54426 to maintain high efficiency during lighter load conditions. The TPS54426 also has a proprietary circuit that enables the device to adopt to both low equivalent series resistance (ESR) output capacitors, such as POSCAP, 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 TPS54426 is available in the 14-pin HTSSOP package and the 16 pin QFN package, designed to operate from –40°C to 85°C.
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類型 標題 下載最新的英語版本 日期
* 數據表 4.5V to 18V Input, 4-A Synchronous Step-Down SWIFT Converter with Eco-Mode 數據表 (Rev. C) 2011年 7月 25日
用戶指南 TPS54426 Step-Down Converter Evaluation Module User's Guide (Rev. A) PDF | HTML 2021年 9月 2日
選擇指南 SWIFT DC/DC Converters Selector Guide (Rev. G) 2019年 2月 6日
應用手冊 TPS54426 應用指導 2015年 9月 2日
應用手冊 基于帶有紋波注入谷底檢測定導通時間頻域分析的D-CAP2?頻率響應模型 英語版 2015年 9月 2日

設計和開發

如需其他信息或資源，請點擊以下任一標題進入詳情頁面查看（如有）。

評估板

TPS54426EVM-608 — 用于 TPS54426 4.5V 至 18V 輸入、4A 同步降壓轉換器的評估模塊

TPS54426EVM-608 是一塊完全組裝且經過測試的電路板，用于評估具有 Eco-Mode 的 TPS54426 同步降壓 SWIFT 轉換器。TPS54426EVM-608 由 4.5V 至 18V 輸入電壓供電，在電流為 4A 時提供 1.05V 的輸出電壓。
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仿真模型

TPS54426 TINA-TI Transient Reference Design

SLVM357.TSC (213 KB) - TINA-TI Reference Design
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仿真模型

TPS54426 TINA-TI Transient Spice Model

SLVM358.ZIP (40 KB) - TINA-TI Spice Model
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仿真模型

TPS54426 Unencrypted PSpice Transient Model Package (Rev. A)

SLVM097A.ZIP (41 KB) - PSpice Model
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參考設計

TIDA-010011 — 適用于保護繼電器處理器模塊的高效電源架構參考設計

該參考設計展示了各種電源架構，這些架構可為需要 >1A 負載電流和高效率的應用處理器模塊生成多個電壓軌。所需的電源通過來自背板的 5V、12V 或 24V 直流輸入生成。電源通過帶集成 FET 的直流/直流轉換器生成并且使用帶集成電感器的電源模塊以減小尺寸。此設計采用 HotRod? 封裝類型，適用于需要低 EMI 的應用，也非常適合設計時間受限的應用。其他功能包括 DDR 端接穩壓器、輸入電源 OR-ing、電壓時序控制、過載保護電子保險絲以及電壓和負載電流監控。該設計可以用于處理器、數字信號處理器和現場可編程門陣列。該設計已依照 CISPR22 標準針對輻射發射進行了測試，符合 A (...)
原理圖: PDF
封裝 引腳 CAD 符號、封裝和 3D 模型
HTSSOP (PWP) 14 Ultra Librarian
VQFN (RSA) 16 Ultra Librarian

訂購和質量

包含信息：
  • RoHS
  • REACH
  • 器件標識
  • 引腳鍍層/焊球材料
  • MSL 等級/回流焊峰值溫度
  • MTBF/時基故障估算
  • 材料成分
  • 鑒定摘要
  • 持續可靠性監測
包含信息：
  • 制造廠地點
  • 封裝廠地點

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