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Maxim > Products > [Power and Battery Management] 
MAX4271, MAX4272, MAX4273
3V to 12V, Current-Limiting, Hot Swap Controllers with Autoretry, DualSpeed/BiLevel Fault Protection

3V to 12V Hot Swap Controller with Latched Protection or Auto-Retry in 8-SO


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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 416kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

Description
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.

An evaluation kit is available:  MAX4273EVKIT  

Key Features   Applications/Uses
  • 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

 
  		• PBXs
  		• RAID
  		• Routers/Switches
  		• Routers/Switches
  		• Telecom
  		• Wireless Base Stations

    Key Specifications:  Hot Swap Controllers
    Part Number VIN
    (V)    		 VIN
    (V)    		 Low Volt. High Volt. Voltage Polarity Type Fault Condition Control Channels Features Package/Pins Price
    min max See Notes
    MAX4271  2.7 13.2 Yes No Positive Positive, Low-Voltage Latched Off 1
    On/Off and STAT Control
    Regulated DualSpeed/BiLevel Current Limit
    Short-Circuit Protection
    SOIC(N)/8
    		 $1.95 @1k
    MAX4272  Periodic Retry
    On/Off and STAT Control
    Regulated DualSpeed/BiLevel Current Limit
    Short-Circuit Protection
    SOIC(N)/8
    		 $2.04 @1k
    MAX4273  Programmable Latched Off or Periodic Retry
    On/Off, STAT, and POR Controls
    Regulated DualSpeed/BiLevel Current Limit
    Short-Circuit Protection
    QSOP/16
    SOIC(N)/16
    		 $2.28 @1k
    See All Hot Swap Controllers (47)

    Diagram
    MAX4271, MAX4272, MAX4273: Typical Operating Circuit
    Typical Operating Circuit

    Application Notes
  		• Application Note 1785: Flexible Hot-Swap Current Limiter Allows Thermal Protection - MAX4271
  		• Application Note 2158: Advantages of IC-Based Hot-Swap Circuit Protection - MAX4272, MAX4273
  		• Application Note 2736: Understanding, Using, and Selecting Hot-Swap Controllers - MAX4271
  		• Application Note 3328: Minimize Short-Circuit Current Pulse in Hot-Swap Controller - MAX4272
  		• Application Note 4245: Three Approaches to Creating Negative Low-Voltage Hot-Swap Circuits - MAX4272

    Evaluation Kits
  		• MAX4273EVKIT

    Design Guides
  		• Amplifiers and Sensors (PDF)

    Reliability Reports
  		• Reliability Report: MAX4272.pdf
  		• Show FIT data for:
  		• Request Reliability Report for:

    Software/Models
    none

    Ordering Information
    Notes:

    1. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
    2. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
    3. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
    4. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.


    Devices: 1-18 of 18

    MAX4271 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX4271ESA-G05    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX4271ESA-TG05    
    		Active SOIC(N);8 pin;31 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0096 (PDF)
    Use pkgcode/variation: S8-5*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX4271ESA    
    		Active SOIC(N);8 pin;31 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0096 (PDF)
    Use pkgcode/variation: S8-5*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX4271ESA-T    
    		Active SOIC(N);8 pin;31 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0096 (PDF)
    Use pkgcode/variation: S8-5*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX4271ESA+  
    		Active SOIC(N);8 pin;31 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0096 (PDF)
    Use pkgcode/variation: S8+5*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX4271ESA+T    
    		Active SOIC(N);8 pin;31 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0096 (PDF)
    Use pkgcode/variation: S8+5*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX4272 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX4272ESA    
    		Active SOIC(N);8 pin;31 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0096 (PDF)
    Use pkgcode/variation: S8-5*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX4272ESA-T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX4272ESA+  
    		Active SOIC(N);8 pin;31 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0096 (PDF)
    Use pkgcode/variation: S8+5*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX4272ESA+T    
    		Active SOIC(N);8 pin;31 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0096 (PDF)
    Use pkgcode/variation: S8+5*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX4273 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX4273EEE    
    		Active QSOP;16 pin;31 mm²
    Outline Drawing: 21-0055 (PDF)
    Land Pattern: 90-0167 (PDF)
    Use pkgcode/variation: E16-5*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX4273EEE-T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX4273EEE+  
    		Active QSOP;16 pin;31 mm²
    Outline Drawing: 21-0055 (PDF)
    Land Pattern: 90-0167 (PDF)
    Use pkgcode/variation: E16+5*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX4273EEE+T    
    		Active QSOP;16 pin;31 mm²
    Outline Drawing: 21-0055 (PDF)
    Land Pattern: 90-0167 (PDF)
    Use pkgcode/variation: E16+5*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX4273ESE    
    		Active SOIC(N);16 pin;62 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0097 (PDF)
    Use pkgcode/variation: S16-5*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX4273ESE-T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX4273ESE+  
    		Active SOIC(N);16 pin;62 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0097 (PDF)
    Use pkgcode/variation: S16+5*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX4273ESE+T    
    		Active SOIC(N);16 pin;62 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0097 (PDF)
    Use pkgcode/variation: S16+5*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis

    More Information
  		• New Product Press Release 2000-08-04  2000-07-12 

    Related Products
    MAX4370 Current-Regulating Hot-Swap Controller with DualSpeed/BiLevel Fault Protection

    More Like This: View Product Families for Similar Products

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    Document Ref.: 19-1694; Rev 2; 2007-12-20
    This page last modified: 2007-12-20


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