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LM25117

正在供貨

具有跟蹤功能的 4.5-42V 寬輸入電壓、電流模式同步降壓控制器

可提供此產(chǎn)品的更新版本

功能與比較器件相同，但引腳排列有所不同
LM25149 正在供貨 具有超低 IQ 和集成式有源 EMI 濾波器的 42V 同步降壓直流/直流控制器 Active EMI filtering and DRSS reduces EMI by an average of 25 dBμV.

產(chǎn)品詳情

Rating Catalog Topology Buck Controller Iout (max) (A) 20 Vin (max) (V) 42 Vin (min) (V) 4.5 Vout (max) (V) 41 Vout (min) (V) 0.8 Control mode current mode Features Adjustable current limit, Enable, Frequency synchronization, Light Load Efficiency, Synchronous Rectification, Tracking, UVLO adjustable Operating temperature range (°C) -40 to 125 Iq (typ) (μA) 4800 Duty cycle (max) (%) 98 Number of phases 1
Rating Catalog Topology Buck Controller Iout (max) (A) 20 Vin (max) (V) 42 Vin (min) (V) 4.5 Vout (max) (V) 41 Vout (min) (V) 0.8 Control mode current mode Features Adjustable current limit, Enable, Frequency synchronization, Light Load Efficiency, Synchronous Rectification, Tracking, UVLO adjustable Operating temperature range (°C) -40 to 125 Iq (typ) (μA) 4800 Duty cycle (max) (%) 98 Number of phases 1
HTSSOP (PWP) 20 41.6 mm2 6.5 x 6.4 WQFN (RTW) 24 16 mm2 4 x 4

  • Emulated peak current mode control
  • Wide operating range from 4.5V to 42V
  • Robust 3.3A peak gate drives
  • Adaptive dead-time output driver control
  • Free-run or synchronizable clock up to 750kHz
  • Optional diode emulation mode
  • Programmable output from 0.8V
  • Precision 1.5% voltage reference
  • Analog current monitor
  • Programmable current limit
  • Hiccup mode over current protection
  • Programmable soft-start and tracking
  • Programmable line under-voltage lockout
  • Programmable switch-over to external bias supply
  • Thermal shutdown

    • Packages

  • TSSOP-20EP (Thermally enhanced)
  • LLP-24 (4mmx4mm)
    •

  • Emulated peak current mode control
  • Wide operating range from 4.5V to 42V
  • Robust 3.3A peak gate drives
  • Adaptive dead-time output driver control
  • Free-run or synchronizable clock up to 750kHz
  • Optional diode emulation mode
  • Programmable output from 0.8V
  • Precision 1.5% voltage reference
  • Analog current monitor
  • Programmable current limit
  • Hiccup mode over current protection
  • Programmable soft-start and tracking
  • Programmable line under-voltage lockout
  • Programmable switch-over to external bias supply
  • Thermal shutdown

    • Packages

  • TSSOP-20EP (Thermally enhanced)
  • LLP-24 (4mmx4mm)
    •

    The LM25117 is a synchronous buck controller intended for step-down regulator applications from a high voltage or widely varying input supply. The control method is based upon current mode control utilizing an emulated current ramp. Current mode control provides inherent line feed-forward, cycle-by-cycle current limiting and ease of loop compensation. The use of an emulated control ramp reduces noise sensitivity of the pulse-width modulation circuit, allowing reliable control of very small duty cycles necessary in high input voltage applications.

    The operating frequency is programmable from 50 kHz to 750 kHz. The LM25117 drives external high-side and low-side NMOS power switches with adaptive dead-time control. A user-selectable diode emulation mode enables discontinuous mode operation for improved efficiency at light load conditions. A high voltage bias regulator that allows external bias supply further improves efficiency. The LM25117’s unique analog telemetry feature provides average output current information. Additional features include thermal shutdown, frequency synchronization, hiccup mode current limit and adjustable line under-voltage lockout.

    The LM25117 is a synchronous buck controller intended for step-down regulator applications from a high voltage or widely varying input supply. The control method is based upon current mode control utilizing an emulated current ramp. Current mode control provides inherent line feed-forward, cycle-by-cycle current limiting and ease of loop compensation. The use of an emulated control ramp reduces noise sensitivity of the pulse-width modulation circuit, allowing reliable control of very small duty cycles necessary in high input voltage applications.

    The operating frequency is programmable from 50 kHz to 750 kHz. The LM25117 drives external high-side and low-side NMOS power switches with adaptive dead-time control. A user-selectable diode emulation mode enables discontinuous mode operation for improved efficiency at light load conditions. A high voltage bias regulator that allows external bias supply further improves efficiency. The LM25117’s unique analog telemetry feature provides average output current information. Additional features include thermal shutdown, frequency synchronization, hiccup mode current limit and adjustable line under-voltage lockout.

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    技術(shù)文檔

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    類型 標題 下載最新的英語版本 日期
    * 數(shù)據(jù)表 Wide Input Range Synchronous Buck Controller with Analog Current Monitor (cn) 數(shù)據(jù)表 (Rev. B) 最新英語版本 (Rev.F) PDF | HTML 2011年 9月 7日
    白皮書 Valuing wide VIN, low EMI synchronous buck circuits for cost-driven, demanding a (Rev. A) 2019年 4月 10日
    選擇指南 電源管理指南 2018 (Rev. K) 2018年 7月 31日
    白皮書 Overcoming Challenges in Designing Step-Dwn Reg Apps w/40V Input Voltage (Rev. A) 2018年 7月 3日
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    模擬設(shè)計期刊 2015 年第 3 季度模擬應(yīng)用期刊 英語版 2015年 9月 8日
    模擬設(shè)計期刊 在 DC/DC 轉(zhuǎn)換器中采用陶瓷或電解輸出電容器 － 為什么不能兼用呢？ 英語版 2015年 9月 8日
    用戶指南 AN-2065 LM5119 Evaluation Board (Rev. B) 2013年 4月 24日
    用戶指南 AN-2103 LM5117 Evaluation Board (Rev. B) 2013年 4月 24日

    設(shè)計和開發(fā)

    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

    LM25117EVAL — LM25117 評估板

    The LM25117 evaluation board provides the design engineer with a fully functional synchronous buck converter based on Emulated Current Mode Control to evaluate the LM25117 controller IC. The evaluation board provides 3.3V output with a 9A current capability in addition with average output current (...)

    用戶指南: PDF
    TI.com 上無現(xiàn)貨
    仿真模型

    LM25117 PSpice Average Model

    SNVM385.ZIP (51 KB) - PSpice Model
    下載
    仿真模型

    LM25117 PSpice Transient Model (Rev. A)

    SNVM386A.ZIP (167 KB) - PSpice Model
    下載
    仿真模型

    LM25117 TINA-TI Average Reference Design (Rev. A)

    SNVM488A.TSC (148 KB) - TINA-TI Reference Design
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    仿真模型

    LM25117 TINA-TI Average Spice Model (Rev. A)

    SNVM489A.ZIP (8 KB) - TINA-TI Spice Model
    下載
    仿真模型

    LM25117 TINA-TI Transient Reference Design(Load transient)

    SNVM490.TSC (196 KB) - TINA-TI Reference Design
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    仿真模型

    LM25117 TINA-TI Transient Reference Design(START UP)

    SNVM491.TSC (226 KB) - TINA-TI Reference Design
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    仿真模型

    LM25117 TINA-TI Transient Spice Model

    SNVM492.ZIP (19 KB) - TINA-TI Spice Model
    下載
    仿真模型

    LM25117 Unencrypted PSpice Average Model

    SNVM864.ZIP (2 KB) - PSpice Model
    下載
    仿真模型

    LM25117 Unencrypted PSpice Transient Model

    SNVM860.ZIP (6 KB) - PSpice Model
    下載
    計算工具

    LM25117-5117QUICK-CALC — LM(2)5117 快速入門計算器

    下載
    參考設(shè)計

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    測試報告: PDF
    原理圖: PDF
    參考設(shè)計

    PMP10509 — 432W 高效單相同步降壓轉(zhuǎn)換器參考設(shè)計

    PMP10509 是一種采用 LM25117 控制器 IC 的高效單相同步降壓轉(zhuǎn)換器。此設(shè)計接受 30.4Vin 至 33.6Vin 輸入電壓（標稱為 32Vin），可實現(xiàn) 24Vout 輸出，并且能夠為負載提供 18A 連續(xù)電流。
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    原理圖: PDF
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    PMP10514 — 300W 高效單相同步降壓轉(zhuǎn)換器參考設(shè)計

    PMP10514 是一種采用 LM25117 控制器 IC 的高效單相同步降壓轉(zhuǎn)換器。此設(shè)計接受 30.4Vin 至 33.6Vin 輸入電壓（標稱為 32Vin），可實現(xiàn) 20 Vout 輸出，并且能夠為負載提供 15A 連續(xù)電流。
    測試報告: PDF
    原理圖: PDF
    封裝 引腳 CAD 符號、封裝和 3D 模型
    HTSSOP (PWP) 20 Ultra Librarian
    WQFN (RTW) 24 Ultra Librarian

    訂購和質(zhì)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(xù)可靠性監(jiān)測
    包含信息：
    • 制造廠地點
    • 封裝廠地點

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    支持和培訓

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