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AC/DC 和 DC/DC 轉換器 (整合式 FET)

TPS54326

現行

具 Eco-Mode™ 的 4.5V 至 18V 輸入、3A 同步降壓轉換器

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功能與所比較的裝置相似
TPS563211 現行 採用 SOT583，具 1% 準確度、PG/SS 和 PFM/強制 PWM 的 4.2-V 至 18-V、3-A、同步降壓轉換器 This product has improved performance, selectable power good or soft start feature

TPS54326

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Topology Buck Iout (max) (A) 3 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) 3 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 (RGT) 16 9 mm² 3 x 3
  • D-CAP2 Mode Enables Fast Transient Response
  • Low Output Ripple and Allows Ceramic Output Capacitor
  • Wide VCC Input Voltage Range: 4.5 V to 18 V
  • Wide VIN Input Voltage Range: 2 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
    - 120 mΩ (High Side) and 70 mΩ (Low Side)
  • High Efficiency, less than 10 µA at Shutdown
  • Auto-Skip Eco-mode™ for High Efficiency at Light Load
  • High Initial Bandgap Reference Accuracy
  • Adjustable Soft Start
  • Pre-Biased Soft Start
  • 700-kHz Switching Frequency (fSW)
  • Cycle-By-Cycle Overcurrent 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 Is a trademark of Texas InstrumentsPower
PAD Is a trademark of Texas InstrumentsPower
  • D-CAP2 Mode Enables Fast Transient Response
  • Low Output Ripple and Allows Ceramic Output Capacitor
  • Wide VCC Input Voltage Range: 4.5 V to 18 V
  • Wide VIN Input Voltage Range: 2 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
    - 120 mΩ (High Side) and 70 mΩ (Low Side)
  • High Efficiency, less than 10 µA at Shutdown
  • Auto-Skip Eco-mode™ for High Efficiency at Light Load
  • High Initial Bandgap Reference Accuracy
  • Adjustable Soft Start
  • Pre-Biased Soft Start
  • 700-kHz Switching Frequency (fSW)
  • Cycle-By-Cycle Overcurrent 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 Is a trademark of Texas InstrumentsPower
PAD Is a trademark of Texas InstrumentsPower

The TPS54326 is an adaptive on-time D-CAP2™ mode synchronous buck converter. The TPS54326 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 TPS54326 uses the D-CAP2™ mode control which provides a fast transient response with no external components. The adoptive on-time control supports seamless operation between PWM mode at heavy load condition and reduced frequency Eco-mode operation at light load for high efficiency.

The TPS54326 also has a proprietary circuit that enables the device to adapt 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 VCC input , and from 2-V to 18-V VIN input power supply voltage. The output voltage can be programmed between 0.76 V and 5.5 V. The device also features an adjustable slow start time and a power good function. The TPS54326 is available in the 14 pin HTSSOP or 16 pin QFN package, and designed to operate from –40°C to 85°C.

The TPS54326 is an adaptive on-time D-CAP2™ mode synchronous buck converter. The TPS54326 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 TPS54326 uses the D-CAP2™ mode control which provides a fast transient response with no external components. The adoptive on-time control supports seamless operation between PWM mode at heavy load condition and reduced frequency Eco-mode operation at light load for high efficiency.

The TPS54326 also has a proprietary circuit that enables the device to adapt 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 VCC input , and from 2-V to 18-V VIN input power supply voltage. The output voltage can be programmed between 0.76 V and 5.5 V. The device also features an adjustable slow start time and a power good function. The TPS54326 is available in the 14 pin HTSSOP or 16 pin QFN package, and designed to operate from –40°C to 85°C.
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功能與所比較的裝置相似
TPS563203 現行 採用 SOT563 的 4.2-V 至 17-V 輸入、3-A 同步降壓轉換器 This product has a smaller package with less external component count
TPS563252 現行 採用 SOT563 的 3-V 至 17-V 輸入電壓、3-A、1.2-Mhz 同步降壓轉換器 This product has a smaller package with 1.2MHz switching frequency

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類型 標題 日期
* Data sheet 4.5V to 18V Input, 3-A Synchronous Step-Down Converter with Eco-mode datasheet (Rev. E) 2012年 6月 6日
User guide TPS54326 Step-Down Converter Evaluation Module User's Guide (Rev. A) PDF | HTML 2021年 10月 11日
Selection guide SWIFT DC/DC Converters Selector Guide (Rev. G) 2019年 2月 6日
Technical article Keeping DC/DC solutions (super) simple for cost-sensitive applications PDF | HTML 2016年 10月 18日
Application note D-CAP2 Frequency Response Model, based on frequency domain analysis of Fixed On- 2013年 1月 2日
Application note Understanding Thermal Dissipation and Design of a Heatsink 2011年 5月 4日

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開發板

TPS54326EVM-540 — 4.5V 至 18V 輸入、3A 轉換器評估模組

The TPS54326 is a single, adaptive on-time D-CAP2™ mode synchronous buck converter requiring a very low external component count. The D-CAP2™ control circuit is optimized for low ESR output capacitors such as POSCAP, SP-CAP or ceramic types and features fast transient response with no external (...)
使用指南: PDF | HTML
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模擬型號

TPS54326 IBIS Model

SLVM731.ZIP (15 KB) - IBIS Model
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模擬型號

TPS54326 TINA-TI Transient Reference Design

SLVM263.TSC (211 KB) - TINA-TI Reference Design
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模擬型號

TPS54326 TINA-TI Transient Spice Model

SLVM264.ZIP (40 KB) - TINA-TI Spice Model
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模擬型號

TPS54326 Unencrypted PSpice Transient Model Package (Rev. A)

SLIM296A.ZIP (41 KB) - PSpice Model
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參考設計

TIDA-010011 — 用於保護繼電器處理器模組的高效電源供應架構參考設計

此參考設計展示各種電源架構，可為需要 >1A 負載電流和高效率的應用處理器模組產生多重電壓軌。所需的電源是使用來自背板的 5、12 或 24-V DC 輸入所產生。電源供應器是使用配備整合式 FET 的 DC-DC 轉換器，以及具尺寸整合式電感器的電源模組所產生。此設計採用 HotRod™ 封裝類型，適合需要低 EMI 的應用。此外也最適合設計時間有限的應用。其他功能包括 DDR 終端穩壓器、輸入電源 OR-ing、電壓序列、用於過載保護的 eFuse，以及電壓和負載電流監控。此設計可搭配處理器、數位訊號處理器以及現場可編程邏輯閘陣列使用。已通過輻射發射測試，符合 A 類和 B 要求的 (...)
Design guide: PDF
電路圖: PDF
封裝 針腳 CAD 符號、佔位空間與 3D 模型
HTSSOP (PWP) 14 Ultra Librarian
VQFN (RGT) 16 Ultra Librarian
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