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LM25117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 4.5-42V 宽输入电压、电流模式同步降压控制器
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LM25117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
    • Catalog
    LM25117具体的完整产品型号参数及价格(美元):

    LM25117的完整型号有:LM25117PMH/NOPB、LM25117PMHE/NOPB、LM25117PMHX/NOPB、LM25117PSQ/NOPB、LM25117PSQE/NOPB、LM25117PSQX/NOPB,以下是这些产品的关键参数及官网采购报价:

    LM25117PMH/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LM25117PMH/NOPB的批量USD价格:1.975(1000+)

    LM25117PMHE/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LM25117PMHE/NOPB的批量USD价格:1.975(1000+)

    LM25117PMHX/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LM25117PMHX/NOPB的批量USD价格:1.646(1000+)

    LM25117PSQ/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LM25117PSQ/NOPB的批量USD价格:1.975(1000+)

    LM25117PSQE/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LM25117PSQE/NOPB的批量USD价格:1.975(1000+)

    LM25117PSQX/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LM25117PSQX/NOPB的批量USD价格:1.646(1000+)

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    LM25117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 (...)

    LM25117 PSpice Average Model

    PSpice for TI 可提供帮助评估模拟电路功能的设计和仿真环境。此功能齐全的设计和仿真套件使用 Cadence 的模拟分析引擎。PSpice for TI 可免费使用,包括业内超大的模型库之一,涵盖我们的模拟和电源产品系列以及精选的模拟行为模型。

    借助?PSpice for TI 的设计和仿真环境及其内置的模型库,您可对复杂的混合信号设计进行仿真。创建完整的终端设备设计和原型解决方案,然后再进行布局和制造,可缩短产品上市时间并降低开发成本。

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

    LM25117-5117QUICK-CALC — LM(2)5117 快速入门计算器

    PMP11114 is a dual port USB Type C Charger. This design takes an automotive input voltage (7V to 18V nominal, load dump to 40V). The output goes to two USB Type ports, each of these ports supplies 5V. The desgin supports 3A on one port and 1.5A on the other port. The DC/DC portion (...)

    PMP10509 — 432W 高效单相同步降压转换器参考设计

    PMP10509 是一种采用 LM25117 控制器 IC 的高效单相同步降压转换器。此设计接受 30.4Vin 至 33.6Vin 输入电压(标称为 32Vin),可实现 24Vout 输出,并且能够为负载提供 18A 连续电流。

    PMP10514 — 300W 高效单相同步降压转换器参考设计

    PMP10514 是一种采用 LM25117 控制器 IC 的高效单相同步降压转换器。此设计接受 30.4Vin 至 33.6Vin 输入电压(标称为 32Vin),可实现 20 Vout 输出,并且能够为负载提供 15A 连续电流。
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