- 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
- 点击这里打开及下载LM25117-Q1的技术文档资料
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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.
- 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+)
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
TIDA-00675 可使用负载开关动态开启/关闭负载,从而降低功耗。设计指南说明了开关频率、占空比和放电电阻的使用如何影响功耗。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。