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MAX5042, MAX5043
Two-Switch Power ICs with Integrated Power MOSFETs and Hot-Swap Controller

Two-Switch, Clamped, PWM Power IC Integrates Power MOSFETs and a Hot-Swap Controller


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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 760kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

Description
The MAX5042/MAX5043 isolated multimode PWM power ICs feature integrated switching power MOSFETs connected in a voltage-clamped, two-transistor, power-circuit configuration. These devices operate from a wide 20V to 76V input voltage range. The MAX5042 includes a hotswap controller for use with an external power MOSFET to limit inrush current for applications where the power supply is plugged into a live power backplane. The MAX5043 does not include a hot-swap controller.

The voltage-clamped power topology of the MAX5042/MAX5043 enables full recovery of stored magnetizing and leakage inductive energy for enhanced efficiency and reliability. Operating at up to 500kHz switching frequency, these devices provide up to 50W of output power. The MAX5042/MAX5043 allow the implementation of both forward and flyback voltage or current-mode converter topologies. A dedicated latched external shutdown provides protection in addition to internal thermal shutdown.

The MAX5042/MAX5043 achieve higher efficiency when used with secondary-side synchronous rectification. These devices generate a look-ahead signal for driving secondary-side synchronous rectifiers.

The MAX5042/MAX5043 are rated for operation over the -40°C to +125°C and -40°C to +85°C temperature range, respectively, and are available in a small surfacemount 56-pin thin QFN package.

Warning: The MAX5042/MAX5043 are designed to work with high voltages. Exercise caution.

An evaluation kit is available:  MAX5042EVKIT  

Key Features   Applications/Uses
  • Reliable Single-Stage Clamped Two-Switch Power ICs for High Efficiency
  • No Reset Winding Required
  • Up to 50W Output Power
  • Integrated High-Voltage 75mΩ Power MOSFETs
  • 20V to 76V Wide Input Voltage Range
  • Feed-Forward Voltage or Current-Mode Control
  • Programmable Brownout Undervoltage Lockout
  • Integrated Current Signal Amplifier for High-Efficiency, Current-Mode Control
  • Internal Overtemperature Shutdown
  • Indefinite Short-Circuit Protection
  • Integrated Thermally Protected High-Voltage Startup Linear Regulator
  • Integrated Hot-Swap Controller (MAX5042)
  • Integrated Look-Ahead Signal Output Drives High-Speed Optocoupler for Secondary-Side Synchronous Rectification
  • >90% Efficiency with Synchronous Rectification
  • Up to 500kHz Switching Frequency
  • High-Power, Small-Footprint 56-Pin Thermally Enhanced QFN Package

 
  		• 42V Automotive Power Supplies
  		• Distributed Power Systems with 48V Bus
  		• High-Efficiency Telecom/Datacom Power Supplies
  		• Power-Supply Modules
  		• Router/Switch Cards with 48V Backplane Power Systems
  		• Servers with 48V Backplane Power Systems
  		• xDSL Line Cards
  		• xDSL Line-Driver Power Supplies

    Key Specifications:  Isolated Power Supplies
    Part Number VIN
    (V)    		 VIN
    (V)    		 Topology Features Cntrl. Loop Feedback Freq.
    (kHz)    		 Duty Cycle
    (%)    		 ISTARTUP
    (mA)    		 ICC
    (mA)    		 Oper. Temp.
    (°C)    		 Price
    min max min max max max See Notes
    MAX5042  20 76
    Flyback
    Two-Switch Forward
    Adjustable Frequency
    High Voltage Start-Up Circuit
    Internal Error Amplifier
    Internal Power MOSFET(s)
    Synchronizable Freqeuncy
    Synchronous Rectifier Driver
    Thermal Shutdown
    UVLO
    		 Voltage Mode
    Linear
    Opto
    		 600 47 2 6 -40 to +125 $4.95 @5k
    MAX5043  $4.67 @1k
    See All Isolated Power Supplies (31)

    Diagram
    MAX5042, MAX5043: Pin Configuration
    Pin Configuration

    Evaluation Kits
  		• MAX5042EVKIT

    Reliability Reports
  		• 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: 1-8 of 8

    MAX5042 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX5042ATN    
    		Active TQFN;56 pin;66 mm²
    Outline Drawing: 21-0135 (PDF)
    Land Pattern: 90-0046 (PDF)
    Use pkgcode/variation: T5688-2*
    		-40°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX5042ATN-T    
    		Active

    Land Pattern: Not Available

    		-40°C to +125°C See data sheet
    MAX5042ATN+  
    		Active TQFN;56 pin;66 mm²
    Outline Drawing: 21-0135 (PDF)
    Land Pattern: 90-0046 (PDF)
    Use pkgcode/variation: T5688+2*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX5042ATN+T    
    		Active

    Land Pattern: Not Available

    		-40°C to +125°C See data sheet
    MAX5043 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX5043ETN+  
    		Active TQFN;56 pin;66 mm²
    Outline Drawing: 21-0135 (PDF)
    Land Pattern: 90-0046 (PDF)
    Use pkgcode/variation: T5688+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX5043ETN+T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX5043ETN    
    		Active TQFN;56 pin;66 mm²
    Outline Drawing: 21-0135 (PDF)
    Land Pattern: 90-0046 (PDF)
    Use pkgcode/variation: T5688-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX5043ETN-T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet

    More Information
  		• New Product Press Release 2004-03-24 

    Related Products
    MAX5051 Parallelable, Clamped Two-Switch Power-Supply Controller IC

    More Like This: View Product Families for Similar Products

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    Document Ref.: 19-3046; Rev 3a; 2005-03-01
    This page last modified: 2009-10-12


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