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TPS54228

現行

具 Eco-mode™ 的 4.5V 至 18V 輸入，2A 同步降壓轉換器

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產品規格表

TPS54228

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Topology Buck Iout (max) (A) 2 Vin (max) (V) 18 Vin (min) (V) 4.5 Vout (max) (V) 7 Vout (min) (V) 0.76 Features Enable, Light-load efficiency, Soft-start adjustable, Synchronous rectification Control mode D-CAP2 Operating temperature range (°C) -40 to 85 Iq (typ) (A) 0.0008 Duty cycle (max) (%) 65
Rating Catalog Topology Buck Iout (max) (A) 2 Vin (max) (V) 18 Vin (min) (V) 4.5 Vout (max) (V) 7 Vout (min) (V) 0.76 Features Enable, Light-load efficiency, Soft-start adjustable, Synchronous rectification Control mode D-CAP2 Operating temperature range (°C) -40 to 85 Iq (typ) (A) 0.0008 Duty cycle (max) (%) 65
HSOIC (DDA) 8 29.4 mm² (4.9 mm × 6 mm) VSON (DRC) 10 9 mm² (3 mm × 3 mm) SOIC (D) 8 29.4 mm² (4.9 mm × 6 mm)
  • 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 7 V
  • Highly Efficient Integrated FETs Optimized
    for Lower Duty Cycle Applications
    – 155 mΩ (High-Side) and 108 mΩ (Low-Side)
  • High Efficiency, Less than 10 µA at Shutdown
  • High Initial Bandgap Reference Accuracy
  • Adjustable Soft Start
  • Prebiased Soft Start
  • 700-kHz Switching Frequency (fSW)
  • Cycle-by-Cycle Overcurrent Limit
  • Auto-Skip Eco-Mode™ for High Efficiency at Light Load
  • 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 7 V
  • Highly Efficient Integrated FETs Optimized
    for Lower Duty Cycle Applications
    – 155 mΩ (High-Side) and 108 mΩ (Low-Side)
  • High Efficiency, Less than 10 µA at Shutdown
  • High Initial Bandgap Reference Accuracy
  • Adjustable Soft Start
  • Prebiased Soft Start
  • 700-kHz Switching Frequency (fSW)
  • Cycle-by-Cycle Overcurrent Limit
  • Auto-Skip Eco-Mode™ for High Efficiency at Light Load

The TPS54228 device is an adaptive on-time D-CAP2™ mode synchronous buck converter. The TPS54228 enables system designers to complete the suite of various end-equipment power bus regulators with a cost effective, low component count, low standby current solution. The main control loop for the TPS54228 uses the D-CAP2™ mode control that provides a 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 TPS54228 to maintain high efficiency during lighter load conditions. The TPS54228 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 7 V. The device also features an adjustable soft start time. The TPS54228 is available in 8-pin SO , 8-pin SOIC, and 10-pin VSON packages, and is designed to operate over the ambient temperature range of –40°C to 85°C.

The TPS54228 device is an adaptive on-time D-CAP2™ mode synchronous buck converter. The TPS54228 enables system designers to complete the suite of various end-equipment power bus regulators with a cost effective, low component count, low standby current solution. The main control loop for the TPS54228 uses the D-CAP2™ mode control that provides a 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 TPS54228 to maintain high efficiency during lighter load conditions. The TPS54228 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 7 V. The device also features an adjustable soft start time. The TPS54228 is available in 8-pin SO , 8-pin SOIC, and 10-pin VSON packages, and is designed to operate over the ambient temperature range of –40°C to 85°C.
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技術文件

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重要文件 類型 標題 格式選項 下載最新的英文版本 日期
* 資料表 TPS54228 4.5-V to 18-V Input, 2-A Synchronous Step-Down Converter With Eco-Mode™ datasheet (Rev. E) PDF | HTML 2016/8/31
技術文章 Tips for making your embedded system’s power rail design smaller PDF | HTML 2019/9/23
選擇指南 Power Management Guide 2018 (Rev. R) 2018/6/25
應用說明 D-CAP2 Frequency Response Model, based on frequency domain analysis of Fixed On- 2013/1/2

設計與開發

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開發板

TPS54228EVM-686 — 具有輕載效率且適用於 TPS54228 同步降壓轉換器的評估模組

The TPS54228EVM-686 is a fully assembled and tested circuit for evaluating the TPS54228 synchronous step-down converter with light load efficiency. The TPS54228EVM-686 operates from a 4.5V to 18V input and provides a 1.05V output at 2A.
使用指南: PDF | HTML
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模擬型號

TPS54228 TINA-TI Transient Reference Design

SLVM418.TSC (654 KB) - TINA-TI 參考設計
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模擬型號

TPS54228 TINA-TI Transient Spice Model

SLVM417.ZIP (41 KB) - TINA-TI Spice 模型
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模擬型號

TPS54228 Unencrypted PSpice Transient Model Package (Rev. A)

SLVM193A.ZIP (43 KB) - PSpice 模型
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參考設計

PMP4472 — AC 輸入、5V/3.3V2A 串級式電源參考設計

PMP4472 是具有高 AC 輸入、5Vout，後接 DC 隔離功能的電源參考設計
2A 時輸出電壓為 3.3V。其實作高效率控制器 UCC28740，以提供 5V 匯流排電壓與降壓轉換器 TPS54228。此設計可實現良好的線路和負載調整，以及良好的動態反應與低輸出漣波電壓。

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封裝 針腳 CAD 符號、佔位空間與 3D 模型
HSOIC (DDA) 8 Ultra Librarian
VSON (DRC) 10 Ultra Librarian
SOIC (D) 8 Ultra Librarian
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