MAX4273

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


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说明

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.
MAX4271、MAX4272、MAX4273:典型工作电路 MAX4271、MAX4272、MAX4273:典型工作电路 放大+

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

应用

  • PBX
  • RAID
  • 路由器/交换机
  • 路由器/交换机
  • 电信
  • 无线基站

请查看具体的参数规格 Hot Swap Controllers (57)


Part NumberVIN
(V)
VIN
(V)
Circuit Breaker/ Current LimitCircuit Breaker/Current Limit Threshold
(mV)
Fault Condition ControlChannelsPositive/Negative RailFeaturesPackage/PinsBudgetary
Price
minmaxSee Notes
MAX4271 2.713.2Current Limit50Latched Off1PositiveDualSpeed/BiLevel Current Limit
SOIC (N)/8
$3.04 @1k
MAX4272 Periodic Retry
SOIC (N)/8
$3.25 @1k
MAX4273 Programmable
QSOP/16
SOIC (N)/16
$3.68 @1k

Pricing Notes:
价格仅供参考,用于同类产品的比较。所提供报价为美元,需要依汇率折合成人民币。该价格将因当地关税、税率和汇率而异。有关特定订购量和指定版本的报价和供货问题,请参考:价格与供货网站或与指定代理商联系。

MAX4273EVKIT: MAX4273评估板
申请可靠性报告: MAX4273 
型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C   Material Composition  

备注: 通过技术手段对故障率进行汇总,并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

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