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LM25117-Q1的基本参数
  • 制造厂商:TI
  • 产品类别:电源管理
  • 技术类目:直流/直流开关稳压器 - 降压稳压器
  • 功能描述:具有跟踪功能的汽车级 4.5-42V 宽输入电压、电流模式同步降压控制器
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LM25117-Q1的产品详情:

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.


LM25117-Q1的优势和特性:

  • 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)
  • LM25117-Q1的参数(英文):
    • Vin (Min) (V)
    • 4.5
    • Vin (Max) (V)
    • 42
    • Vout (Min) (V)
    • 0.8
    • Vout (Max) (V)
    • 41
    • Iout (Max) (A)
    • 20
    • Iq (Typ) (uA)
    • 4800
    • Switching frequency (Min) (kHz)
    • 50
    • Switching frequency (Max) (kHz)
    • 750
    • Features
    • Adjustable Current Limit, Enable, Frequency Synchronization, Light Load Efficiency, Synchronous Rectification, Tracking, UVLO Adjustable
    • Regulated outputs (#)
    • 1
    • Number of phases
    • 1
    • Rating
    • Automotive
    LM25117-Q1具体的完整产品型号参数及价格(美元):

    LM25117-Q1的完整型号有:LM25117QPMH/NOPB、LM25117QPMHE/NOPB、LM25117QPMHX/NOPB、LM25117QPSQ/NOPB、LM25117QPSQE/NOPB、LM25117QPSQX/NOPB,以下是这些产品的关键参数及官网采购报价:

    LM25117QPMH/NOPB,工作温度:-40 to 125,封装:HTSSOP (PWP)-20,包装数量MPQ:73个,MSL 等级/回流焊峰值温度:Level-3-260C-168 HR,引脚镀层/焊球材料:SN,TI官网LM25117QPMH/NOPB的批量USD价格:2.387(1000+)

    LM25117QPMHE/NOPB,工作温度:-40 to 125,封装:HTSSOP (PWP)-20,包装数量MPQ:250个,MSL 等级/回流焊峰值温度:Level-3-260C-168 HR,引脚镀层/焊球材料:SN,TI官网LM25117QPMHE/NOPB的批量USD价格:2.387(1000+)

    LM25117QPMHX/NOPB,工作温度:-40 to 125,封装:HTSSOP (PWP)-20,包装数量MPQ:2500个,MSL 等级/回流焊峰值温度:Level-3-260C-168 HR,引脚镀层/焊球材料:SN,TI官网LM25117QPMHX/NOPB的批量USD价格:2.058(1000+)

    LM25117QPSQ/NOPB,工作温度:-40 to 125,封装:WQFN (RTW)-24,包装数量MPQ:1000个,MSL 等级/回流焊峰值温度:Level-1-260C-UNLIM,引脚镀层/焊球材料:SN,TI官网LM25117QPSQ/NOPB的批量USD价格:2.387(1000+)

    LM25117QPSQE/NOPB,工作温度:-40 to 125,封装:WQFN (RTW)-24,包装数量MPQ:250个,MSL 等级/回流焊峰值温度:Level-1-260C-UNLIM,引脚镀层/焊球材料:SN,TI官网LM25117QPSQE/NOPB的批量USD价格:2.387(1000+)

    LM25117QPSQX/NOPB,工作温度:-40 to 125,封装:WQFN (RTW)-24,包装数量MPQ:4500个,MSL 等级/回流焊峰值温度:Level-1-260C-UNLIM,引脚镀层/焊球材料:SN,TI官网LM25117QPSQX/NOPB的批量USD价格:2.058(1000+)

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    LM25117-Q1的评估套件:

    LM25117EVAL — LM25117 评估板

    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 (...)

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    在?PSpice for TI 设计和仿真工具中,您可以搜索 TI (...)

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    TIDA-00160 — 具有线路压降补偿的车用 USB 充电器的参考设计

    该设计可将8V-42V直流输入转换成5.1V输出,并受TPS2546-Q1可编程电流保护开关保护。其具有的握手协议可为智能手机/平板/手持式设备实现快速充电。通过检测负载电流,并调节DC/DC输出电压,该设计可实现线性USB线缆压差补偿功能,以保持USB端口电压在限定范围内。该设计适用于车载式主机和远端USB集线器等设备。
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