MAX4271:3V至12V、限流型、热插拔控制器,带有自动重试以及DualSpeed/BiLevel故障保护

3V至12V热插拔控制器,提供闭锁保护或自动重试功能,8引脚SO封装

The MAX4271/MAX4272/MAX4273 comprise a complete family of integrated 3V to 12V hot-swap controllers. They allow the safe insertion and removal of circuit cards into live backplanes. The discharged filter capacitors of the circuit card provide a low impedance to the live backplane. High in-rush currents from the backplane to the circuit card can burn up connectors and components, or momentarily collapse the backplane power supply leading to a system reset. This family of hot-swap controllers prevents such problems by regulating the current to a preset limit when the board is plugged in, allowing the system to stabilize safely. After the startup cycle is completed, two on-chip comparators provide DualSpeed/BiLevel™ protection against short circuits, load glitches, and overcurrent conditions. In the event of a fault condition, the load is disconnected. Fault recovery is handled by unlatching (MAX4271), autoretry (MAX4272), or programmed (MAX4273) methods. The MAX4271 family includes many integrated features that reduce component count and design time. An on-board charge pump provides the gate drive for a low-cost, external n-FET. Integrated features like startup current regulation and current glitch protection eliminate external timing resistors and capacitors. Also featured are an open-drain status output to indicate a fault condition, and an adjustable overcurrent response time. The MAX4271 (latched fault protection) and MAX4272 (autoretry fault protection) come in 8-pin SO packages. The MAX4273 (full function) comes in the space-saving 16-pin QSOP package and 16-pin SO package. All parts are specified across the extended temperature range, and have an absolute maximum rating of 15V to provide extra protection against inductive kickback during board removal.

关键特性
  • Provide Safe Hot Swap for +3V to +12V Power Supplies with Few External Components
  • Unique Current Regulation Architecture Minimizes n-FET Linear Mode Duration
  • Autoretry Feature (MAX4272/MAX4273)
  • DualSpeed/BiLevel Current Limit Protects Against Current Glitches and Short Circuits
  • Power-On RESET (MAX4273)
  • 15V Absolute Maximum Rating Protects Against Inductive Kickbacks During Board Removal
  • Internal Charge Pump Generates Gate Drive for External n-MOSFET
  • Status Output Pin Indicates Fault/Safe Condition
  • Space-Saving 8-Pin SO, 16-Pin QSOP Packages
MAX4271、MAX4272、MAX4273:典型工作电路
MAX4271、MAX4272、MAX4273:典型工作电路
应用
  • PBX
  • RAID
  • 路由器/交换机
  • 路由器/交换机
  • 电信
  • 无线基站
数据手册DataSheet
语言下载文件备注
英文MAX4271-MAX4273.pdfRev 2; 12/2007
关键参数
Part NumberVIN
(V)
VIN
(V)
Circuit Breaker/ Current LimitCircuit Breaker/Current Limit Threshold
(mV)
Fault Condition ControlChannelsPositive/Negative RailFeaturesPackage/PinsBudgetary
Price
minmaxSee Notes
MAX42712.713.2Current Limit50Latched Off1PositiveDualSpeed/BiLevel Current LimitSOIC(N)/8$2.84 @1k
MAX4272Periodic RetrySOIC(N)/8$2.84 @1k
MAX4273Programmable
  • QSOP/16
  • SOIC(N)/16
$3.50 @1k
开发工具
技术资料
质量和环境数据
相关产品
  • MAX4370:电流调节热插拔控制器,带有DualSpeed/BiLevel故障保护
订购型号
型号状况推荐替代产品封装温度RoHS/无铅
MAX4271ESA生产中SOIC(N),;8引脚;30.9mm²-40°C至+85°CRoHS/无铅:否
MAX4271ESA+生产中SOIC(N),;8引脚;30.9mm²-40°C至+85°CRoHS/无铅:无铅
MAX4271ESA+T生产中SOIC(N),;8引脚;30.9mm²-40°C至+85°CRoHS/无铅:无铅
MAX4271ESA-G05停止供货N.SO;-40°C至+85°C参考数据资料
MAX4271ESA-T停止供货MAX4271ESA+TSOIC(N),;8引脚;30.9mm²-40°C至+85°CRoHS/无铅:否
MAX4271ESA-TG05停止供货SOIC(N),;8引脚;30.9mm²-40°C至+85°CRoHS/无铅:否
MAX4271-MAX4273.pdf MAX4273
Understanding, Using, and Selecting Hot-Swap Controllers MAX5900
Flexible Hot-Swap Current Limiter Allows Thermal Protection MAX4370
MAX4271.pdf MAX4271
MAX4271-MAX4273.pdf MAX4273