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LM25117-Q1

正在供貨

具有跟蹤功能的汽車級 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
LM25141-Q1 正在供貨 具備展頻頻譜的汽車級 2.2MHz 低 IQ 同步降壓控制器 Improved EMI performance, efficiency and lower IQ.

產(chǎn)品詳情

Rating Automotive 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 Automotive 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
    白皮書 Overcoming Challenges in Designing Step-Dwn Reg Apps w/40V Input Voltage (Rev. A) 2018年 7月 3日
    模擬設(shè)計期刊 Reduce buck-converter EMI and voltage stress by minimizing inductive parasitics 2016年 7月 21日
    應(yīng)用手冊 帶有線路補償功能的車載USB充電器的設(shè)計 2014年 10月 4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
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    仿真模型

    LM25117 PSpice Transient Model (Rev. A)

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

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

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

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

    SNVM489A.ZIP (8 KB) - TINA-TI Spice Model
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    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
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    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

    TIDA-00675 — 通過動態(tài)切換降低功耗的參考設(shè)計

    TIDA-00675 可使用負載開關(guān)動態(tài)開啟/關(guān)閉負載，從而降低功耗。設(shè)計指南說明了開關(guān)頻率、占空比和放電電阻的使用如何影響功耗。
    設(shè)計指南: PDF
    原理圖: PDF
    參考設(shè)計

    TIDA-00160 — 具有線路壓降補償?shù)能囉?USB 充電器的參考設(shè)計

    該設(shè)計可將8V-42V直流輸入轉(zhuǎn)換成5.1V輸出，并受TPS2546-Q1可編程電流保護開關(guān)保護。其具有的握手協(xié)議可為智能手機/平板/手持式設(shè)備實現(xiàn)快速充電。通過檢測負載電流，并調(diào)節(jié)DC/DC輸出電壓，該設(shè)計可實現(xiàn)線性USB線纜壓差補償功能，以保持USB端口電壓在限定范圍內(nèi)。該設(shè)計適用于車載式主機和遠端USB集線器等設(shè)備。
    設(shè)計指南: 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

    推薦產(chǎn)品可能包含與 TI 此產(chǎn)品相關(guān)的參數(shù)、評估模塊或參考設(shè)計。

    支持和培訓

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