LM5117Q1具有模拟电流监视器的宽输入范围同步降压控制器4片.pdf

VOUTSSRESRTCOMPFBRAMPPGNDCSGCSLOSWHOHBVCCVINAGNDUVLOVCCDISDEMBCMVINVOUTSWLM5117ProductFolderSample &BuyTechnicalDocumentsTools &SoftwareSupport &CommunityLM5117,LM5117-Q1ZHCS579F –APRIL 2011–REVISED AUGUST 2015LM5117/Q1具具有有模模拟拟电电流流监监视视器器的的宽宽输输入入范范围围同同步步降降压压控控制制器器1特特性性3说说明明1• LM5117-Q1符合汽车级应用要求LM5117是一款用于由高压或宽变化范围输入电源供电的降压稳压器应用的同步降压控制器此控制方法基•具有符合AEC-Q100标准的下列结果：于采用仿真电流斜坡的电流模式控制电流模式控制–器件温度1级：-40°C至125°C的环境运行温度范围可提供内部线路前馈、逐周期电流限制和简化的环路补•仿真峰值电流模式控制偿通过使用仿真电流斜坡可降低脉宽调制电路的噪•宽工作电压范围：5.5V至65V声灵敏度，从而对高输入电压应用中所需的极小占空比•稳健耐用的3.3A峰值栅极驱动进行可靠控制。

•自适应死区输出驱动器控制工作频率可在50kHz至750kHz之间进行编程•自由运行或同步运行时钟频率最高可达750kHz LM5117使用自适应死区时间控制来驱动外部高侧和低•可选二极管仿真模式侧NMOS功率开关用户可选二极管仿真模式可实现•可编程输出（基准电压为0.8V）断续模式运行，从而提高轻负载条件下的效率凭借•精度为1.5%的基准电压高压偏置稳压器，器件可以使用外部偏置电源，从而进•模拟电流监视器一步提高效率LM5117具备独特的模拟遥测功能，•可编程电流限制可提供平均输出电流信息其他特性包括：热关断、•断续模式过流保护频率同步、断续模式电流限制和可调线路欠压锁定•可编程软启动和跟踪器器件件信信息息(1)•可编程线路欠压锁定器器件件型型号号封封装装封封装装尺尺寸寸（（标标称称值值））•可编程切换至外部偏置电源LM5117 HTSSOP (20) PWP 6.50mm x 4.40mm•热关断LM5117-Q1 WQFN (24) RTW 4.00mm x 4.00mm2应应用用(1)如需了解所有可用封装，请见数据表末尾的可订购产品附录•车用信息娱乐•工业DC-DC电机驱动器•汽车USB电源•电信服务器典典型型应应用用1An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,intellectual property matters and other important disclaimers. PRODUCTION DATA. English Data Sheet: SNVS698LM5117,LM5117-Q1ZHCS579F –APRIL 2011–REVISED AUGUST 2015 目目录录7.3 Feature Description................................................. 131特特性性.......................................................................... 17.4 Device Functional Modes........................................ 212应应用用.......................................................................... 18 Application and Implementation........................ 223说说明明.......................................................................... 18.1 Application Information............................................ 224修修订订历历史史记记录录........................................................... 28.2 Typical Applications ............................................... 225 Pin Configuration and Functions......................... 38.3 Detailed Design Procedure..................................... 226 Specifications......................................................... 58.4 Application Curves.................................................. 326.1 Absolute Maximum Ratings ..................................... 59 Power Supply Recommendations...................... 356.2 ESD Ratings (LM5117)............................................. 510 Layout................................................................... 356.3 ESD Ratings (LM5117-Q1)....................................... 510.1 Layout Guideline................................................... 356.4 Recommended Operating Conditions....................... 611器器件件和和文文档档支支持持..................................................... 366.5 Thermal Information.................................................. 611.1相关链接................................................................ 366.6 Electrical Characteristics........................................... 711.2社区资源................................................................ 366.7 Switching Characteristics.......................................... 811.3商标....................................................................... 366.8 Typical Characteristics.............................................. 911.4静电放电警告......................................................... 367 Detailed Description............................................ 1111.5 Glossary................................................................ 367.1 Overview................................................................. 1112机机械械、、封封装装和和可可订订购购信信息息....................................... 367.2 Functional Block Diagram....................................... 124修修订订历历史史记记录录NOTE: Page numbers for previous revisions may differ from page numbers in the current version.Changes from Revision E (March 2013) to Revision F Page•已添加器件信息和引脚配置和功能部分，ESD额定值表，特性描述，器件功能模式，应用和实施，电源相关建议，布局，器件和文档支持以及机械、封装和可订购信息部分......................................................................................................... 1• Changed µH into µF ............................................................................................................................................................ 29Changes from Revision D (March 2013) to Revision E Page• Changed layout of National Data Sheet to TI format ........................................................................................................... 342 Copyright © 2011–2015, Texas Instruments IncorporatedPGNDUVLOAGNDDEMBRESSSRTFBCOMP CM1623458 920141519181716131211VINLOHB HOSWVCCCSGCSRAMP21222324VCCDIS7 10NCNCNCNCEPUVLOAGNDDEMBRESSSRTFBCOMPCMVINPGNDLOHBHOSWVCCCSGCSRAMP1623458920141519181716131211EPVCCDIS107LM5117,LM5117-Q ZHCS579F –APRIL 2011–REVISED AUGUST 20155 Pin Configuration and FunctionsPWP Package20-Pin HTSSOPTop ViewRTW Package24。