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Maxim > Products > [Protection and Isolation]  [Power and Battery Management] 
MAX4923*, MAX4924, MAX4925, MAX4926
Overvoltage Protectors with External pFET

Provides Overvoltage Protection for up to +28V

*Future Product
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    Status
    Part Number Status
    MAX4923 Future Product
    MAX4924 Active: In Production.
    MAX4925 Active: In Production.
    MAX4926 Active: In Production.

    Data Sheet
    FULL DATA SHEET (PDF, 208kB)
    Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

    Description
    The MAX4923–MAX4926 overvoltage protection (OVP) controllers protect low-voltage systems against high-voltage faults of up to +28V with an appropriate external pFET. When the input voltage exceeds the overvoltage lockout (OVLO) threshold, or falls below the undervoltage lockout (UVLO) threshold, these devices turn off the pFET to prevent damage to protected components and issue a flag to notify the processor of a fault condition.

    The typical overvoltage trip level is set to 7.18V (MAX4923), 6.16V (MAX4924), 5.65V (MAX4925), and 4.46V (MAX4926). The undervoltage trip level is set to 2.44V (typ) for all devices.

    The input (IN) is ESD protected to ±15kV HBM when bypassed to ground with a 1µF ceramic capacitor. All devices are offered in a small, 6-pin (1.5mm x 1.0mm) µDFN package and are specified over the extended -40°C to +85°C temperature range.

    Key Features   Applications/Uses
    • Overvoltage Protection Up to +28V
    • Preset 7.18V, 6.16V, 5.65V, and 4.46V Typical Overvoltage Trip Levels
    • Preset 2.44V Typical Undervoltage Trip Level
    • ±2.5% Accurate Overvoltage/Undervoltage Trip Levels
    • Low 13µA (typ) Supply Current
    • Drives External pFET
    • 20ms Adapter Debounce Time
    • Fault Flag Indicator
    • 6-Pin (1.5mm x 1.0mm) µDFN Package

    		 
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    Key Specifications:  Overvoltage Protection Controllers
    Part Number Channels VIN
    (V)    		 VIN
    (V)    		 Over Voltage Trip Level
    (V)    		 Under Voltage Lockout
    (V)    		 Over Volt. Flag tGATE (On)
    (ms)    		 tGATE (Off)
    (µs)    		 Package/Pins Price
    min max See Notes
    MAX4923 NEW! 1 1.8 28 7.18 2.44 Open-Drain 20 5
    See Data Sheet/
    		 -
    MAX4924  6.15
    µDFN/6
    		 $0.70 @1k
    MAX4925  5.65
    µDFN/6
    		 $0.70 @1k
    MAX4926  4.46
    µDFN/6
    		 $0.70 @1k
    See All Overvoltage Protection Controllers (47)

    Diagram
    MAX4923, MAX4924, MAX4925, MAX4926: Typical Operating Circuit
    Typical Operating Circuit

    Design Guides
  		• Interface (PDF)
  		• Battery Management (PDF)

    Reliability Reports
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    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: 1-5 of 5

    MAX4924 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX4924ELT+T    
    		Active µDFN;6 pin;2 mm²
    Outline Drawing: 21-0147 (PDF)
    Land Pattern: 90-0080 (PDF)
    Use pkgcode/variation: L611+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX4924ELT+  
    		Active µDFN;6 pin;2 mm²
    Outline Drawing: 21-0147 (PDF)
    Land Pattern: 90-0080 (PDF)
    Use pkgcode/variation: L611+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX4925 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX4925ELT+T    
    		Active µDFN;6 pin;2 mm²
    Outline Drawing: 21-0147 (PDF)
    Land Pattern: 90-0080 (PDF)
    Use pkgcode/variation: L611+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX4925ELT+  
    		Active µDFN;6 pin;2 mm²
    Outline Drawing: 21-0147 (PDF)
    Land Pattern: 90-0080 (PDF)
    Use pkgcode/variation: L611+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX4926 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX4926ELT+T    
    		Active µDFN;6 pin;2 mm²
    Outline Drawing: 21-0147 (PDF)
    Land Pattern: 90-0080 (PDF)
    Use pkgcode/variation: L611+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis

    More Information
  		• Topmark Coding: MAX4923 MAX4924 MAX4925 MAX4926
  		• New Product Press Release 2007-06-18 

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    Document Ref.: 19-0810; Rev 0; 2007-05-16
    This page last modified: 2009-08-18


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