具有模拟电流监视器的汽车级 5.5-65V 宽输入电压、电流模式同步降压控制器 20-HTSSOP -40 to 125
The LM5117 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 LM5117 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 LM5117’s unique analog telemetry feature provides average output current information. Additional features include thermal shutdown, frequency synchronization, hiccup mode current limit, and adjustable line undervoltage lockout.
输出接口数 1
输出电压 0.8 V
输出电流 20 A
静态电流 4.80 mA
调节输出数 1
开关频率 200kHz, 480kHz
拓扑结构 Buck
输入电压Max 65 V
输入电压Min 5.5 V
输出电流Max 20 A
工作温度Max 125 ℃
工作温度Min 40 ℃
输入电压 65 V
安装方式 Surface Mount
引脚数 20
封装 HTSSOP-20
封装 HTSSOP-20
工作温度 -40℃ ~ 125℃ TJ
产品生命周期 Active
包装方式 Tape & Reel TR
RoHS标准 RoHS Compliant
含铅标准 Lead Free
型号/品牌 | 代替类型 | 替代型号对比 |
---|---|---|
LM5117QPMHE/NOPB TI 德州仪器 | 当前型号 | 当前型号 |
LM5117QPMH/NOPB 德州仪器 | 完全替代 | LM5117QPMHE/NOPB和LM5117QPMH/NOPB的区别 |
LM5117QPMHX/NOPB 德州仪器 | 类似代替 | LM5117QPMHE/NOPB和LM5117QPMHX/NOPB的区别 |