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AC/DC 和 DC/DC 轉換器 (整合式 FET)

TPS542951

現行

具可調式緩啟動的 4.5 V 至 18 V 輸入、2 A/3 A 雙通道同步降壓轉換器

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產品規格表

TPS542951

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Operating temperature range (°C) -40 to 85 Topology Buck Type Converter Iout (max) (A) 2 Vin (min) (V) 4.5 Vin (max) (V) 18 Switching frequency (min) (kHz) 700 Switching frequency (max) (kHz) 700 Features Enable, Light Load Efficiency, Soft Start Adjustable, Synchronous Rectification Control mode D-CAP2 Vout (min) (V) 0.76 Vout (max) (V) 7 Iq (typ) (µA) 1300 Duty cycle (max) (%) 85
Rating Catalog Operating temperature range (°C) -40 to 85 Topology Buck Type Converter Iout (max) (A) 2 Vin (min) (V) 4.5 Vin (max) (V) 18 Switching frequency (min) (kHz) 700 Switching frequency (max) (kHz) 700 Features Enable, Light Load Efficiency, Soft Start Adjustable, Synchronous Rectification Control mode D-CAP2 Vout (min) (V) 0.76 Vout (max) (V) 7 Iq (typ) (µA) 1300 Duty cycle (max) (%) 85
HTSSOP (PWP) 16 32 mm² 5 x 6.4 VQFN (RSA) 16 16 mm² 4 x 4
  • D-CAP2 Control Mode
    • Fast Transient Response
    • No External Parts Required For Loop
      Compensation
    • Compatible with Ceramic Output
      Capacitors
  • Wide Input Voltage Range :
    4.5 V to 18 V
  • Output Voltage Range :
    0.76V to 7.0V
  • Highly Efficient Integrated FETs Optimized
    for Low Duty Cycle Applications
    • 150 mΩ (High Side) and
      100 mΩ (Low Side)
  • High Initial Reference Accuracy
  • Supports Constant 2 A CH1 and
    3 A CH2 Load Current
  • Low-Side rDS(on) Loss-Less Current
    Sensing
  • Adjustable Soft Start
  • Non-Sinking Pre-Biased Soft Start
  • 700 kHz Switching Frequency
  • Cycle-by-Cycle Over-Current Limit Control
  • OCL/UVLO/TSD Protections
  • Hiccup Timer for Overload Protection
  • Adaptive Gate Drivers with Integrated
    Boost PMOS Switch
  • OCP Constant Due To Thermally Compensated
    rDS(on) with 4000ppm/°C
  • 16-Pin HTSSOP, 16-Pin VQFN
  • Auto-Skip Eco-mode™ for High Efficiency at Light Load
  • D-CAP2 Control Mode
    • Fast Transient Response
    • No External Parts Required For Loop
      Compensation
    • Compatible with Ceramic Output
      Capacitors
  • Wide Input Voltage Range :
    4.5 V to 18 V
  • Output Voltage Range :
    0.76V to 7.0V
  • Highly Efficient Integrated FETs Optimized
    for Low Duty Cycle Applications
    • 150 mΩ (High Side) and
      100 mΩ (Low Side)
  • High Initial Reference Accuracy
  • Supports Constant 2 A CH1 and
    3 A CH2 Load Current
  • Low-Side rDS(on) Loss-Less Current
    Sensing
  • Adjustable Soft Start
  • Non-Sinking Pre-Biased Soft Start
  • 700 kHz Switching Frequency
  • Cycle-by-Cycle Over-Current Limit Control
  • OCL/UVLO/TSD Protections
  • Hiccup Timer for Overload Protection
  • Adaptive Gate Drivers with Integrated
    Boost PMOS Switch
  • OCP Constant Due To Thermally Compensated
    rDS(on) with 4000ppm/°C
  • 16-Pin HTSSOP, 16-Pin VQFN
  • Auto-Skip Eco-mode™ for High Efficiency at Light Load

The TPS542951 is a dual, adaptive on-time D-CAP2™ mode synchronous buck converter. The TPS542951 enables system designers to complete the suite of various end equipment’s power bus regulators with a cost effective, low component count, and low standby current solution. The main control loops of the TPS542951 use 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 TPS542951 to maintain high efficiency during lighter load conditions. The TPS542951 is able 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 provides convenient and efficient operation with input voltages from 4.5V to 18V.

The TPS542951 is available in a 4.4mm × 5.0mm 16 pin TSSOP (PWP) package, and 4mm × 4mm 16 pin VQFN (RSA) package, and is specified for an ambient temperature range from –40°C to 85°C.

The TPS542951 is a dual, adaptive on-time D-CAP2™ mode synchronous buck converter. The TPS542951 enables system designers to complete the suite of various end equipment’s power bus regulators with a cost effective, low component count, and low standby current solution. The main control loops of the TPS542951 use 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 TPS542951 to maintain high efficiency during lighter load conditions. The TPS542951 is able 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 provides convenient and efficient operation with input voltages from 4.5V to 18V.

The TPS542951 is available in a 4.4mm × 5.0mm 16 pin TSSOP (PWP) package, and 4mm × 4mm 16 pin VQFN (RSA) package, and is specified for an ambient temperature range from –40°C to 85°C.
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TPS542941 現行 具 1 ms 固定式緩啟動的 4.5 V 至 18 V 輸入、2 A/3 A 雙通道同步降壓轉換器 This is a dual-channel 2-A / 3-A output product with Power Good function.
最新 TPS562203 現行 採用 SOT563 且具 eco-mode 的 4.2-V 至 17-V 輸入， 2-A 同步降壓轉換器 This product is single output with less external component count
TPS562211 現行 採用 SOT583，具 1% 準確度、PG/SS 和 PFM/強制 PWM 的 4.2-V 至 18-V、2-A、同步降壓轉換器 This product has single output, selectable power good or soft start feature

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類型 標題 日期
* Data sheet 2A/3A Dual Channel Synchronous Step-Down Switcher With Integrated FET, TPS542951 datasheet (Rev. B) 2013年 10月 8日
White paper Understanding Functional Safety FIT Base Failure Rate Estimates per IEC 62380 and SN 29500 (Rev. A) PDF | HTML 2024年 4月 30日
User guide TPS542951 Step-Down Converter Evaluation Module User's Guide (Rev. A) PDF | HTML 2021年 10月 12日

設計與開發

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開發板

TPS542951EVM-057 — TPS542951 評估模組

The Texas Instruments TPS542951EVM-057 evaluation module (EVM) helps designers evaluate the performance of the TPS542951 2A/3A Output, 18V Dual Synchronous Converter.
使用指南: PDF | HTML
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模擬型號

TPS542951 Unencrypted PSpice Transient Model Package (Rev. A)

SLVM638A.ZIP (124 KB) - PSpice Model
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參考設計

PMP10878 — 具有隔離式返馳、雙路輸出 USB 充電器和 LDO 的 90V 至 134V AC 輸入參考設計

The PMP10878 is an isolated dual port USB charger powered from an AC source.  This design allows for up to 36W of power delivery through both USB chargers and the secondary side of a flyback.
Test report: PDF
電路圖: PDF
封裝 針腳 CAD 符號、佔位空間與 3D 模型
HTSSOP (PWP) 16 Ultra Librarian
VQFN (RSA) 16 Ultra Librarian
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  • 認證摘要
  • 進行中持續性的可靠性監測
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