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Maxim > Products > [Analog Switches and Multiplexers] 
MAX4785, MAX4786, MAX4787, MAX4788
50mA/100mA Current-Limit Switches


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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 664kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

Description
The MAX4785-MAX4788 family of switches feature internal current limiting to prevent host devices from being damaged due to faulty load conditions. These analog switches have a low 0.7Ω on-resistance and operate from a 2.3V to 5.5V input voltage range. They are available with guaranteed 50mA and 100mA current limits, making them ideal for load-switching applications.

When the switch is on and a load is connected to the port, a guaranteed blanking time of 14ms ensures that the transient voltages settle down. If after this blanking time the load current is greater than the current limit, the MAX4785 and MAX4787 enter a latch-off state where the switch is turned off and active-low FLAG is issued to the microprocessor. The switch can be turned on again by cycling the power or the ON pin.

The MAX4786 and MAX4788 have an autoretry feature where the switch turns off after the blanking time and then continuously checks to see if the overload condition is present. The switch remains on after the overload condition disappears.

The MAX4785 and MAX4787 are available in a tiny space-saving 4-pin or 5-pin SC70 package. The MAX4786 and MAX4788 are available only in the 4-pin SC70 package. For higher current current-limiting switches, refer to the MAX4789-MAX4794 and MAX1693 data sheets.

Key Features   Applications/Uses
  		• Guaranteed Current Limit: 50mA, 100mA
  		• Thermal-Shutdown Protection
  		• Reverse-Current Protection
  		• 0.7Ω On-Resistance
  		• 14ms Guaranteed Blanking Time
  		• FLAG-bar Function (MAX4785/MAX4787)
  		• 65µA Supply Current
  		• 8µA Latch-Off Current (MAX4785/MAX4787)
  		• 0.01µA Shutdown Current
  		• 2.3V to 5.5V Supply Range
  		• Undervoltage Lockout
  		• Fast Current-Limit Response Time
  		• Tiny SC70 Package

    		  
  		• Cell Phones
  		• Global Positioning Systems (GPS)
  		• Handheld Devices
  		• PDAs and Palmtop Devices

    Key Specifications:  Current Limit Switches
    Part Number Current Limit
    (mA)    		 Functions ILOAD
    (A)    		 RON
    (Ω)    		 VIN
    (V)    		 Fault Indicator Fault Blanking Timeout
    (ms)    		 Package/Pins Smallest Available Pckg.
    (mm2)    		 Oper. Temp.
    (°C)    		 Price
    max typ max w/pins See Notes
    MAX4785  50
    FLAG function
    Fault Blanking
    		 0.05 0.7 2.3 to 5.5 Yes 14
    SC70/4
    SC70/5
    		 5 -40 to +85 $0.70 @1k
    MAX4786  50
    Auto Retry
    Fault Blanking
    		 0.05 No
    SC70/4
    		 $0.78 @1k
    MAX4787  100
    FLAG function
    Fault Blanking
    		 0.1 Yes
    SC70/4
    SC70/5
    		 $0.70 @1k
    MAX4788  100
    Auto Retry
    Fault Blanking
    		 0.1 No
    SC70/4
    		 $0.78 @1k
    See All Current Limit Switches (27)

    Diagram
    MAX4785, MAX4786, MAX4787, MAX4788: Functional Diagram
    Functional Diagram

    Design Guides
  		• Signal Routing & Protection (PDF)

    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: 1-17 of 17

    MAX4785 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX4785EXK+  
    		Active SC70;5 pin;5 mm²
    Outline Drawing: 21-0076 (PDF)
    Land Pattern: 90-0188 (PDF)
    Use pkgcode/variation: X5+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX4785EXK+T    
    		Active SC70;5 pin;5 mm²
    Outline Drawing: 21-0076 (PDF)
    Land Pattern: 90-0188 (PDF)
    Use pkgcode/variation: X5+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX4785EXS-T    
    		Active SC70;4 pin;5 mm²
    Outline Drawing: 21-0098 (PDF)
    Land Pattern: 90-0187 (PDF)
    Use pkgcode/variation: X4-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX4785EXK-T    
    		Active SC70;5 pin;5 mm²
    Outline Drawing: 21-0076 (PDF)
    Land Pattern: 90-0188 (PDF)
    Use pkgcode/variation: X5-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX4786 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX4786EXS+  
    		Active SC70;4 pin;5 mm²
    Outline Drawing: 21-0098 (PDF)
    Land Pattern: 90-0187 (PDF)
    Use pkgcode/variation: X4+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX4786EXS-T    
    		Active SC70;4 pin;5 mm²
    Outline Drawing: 21-0098 (PDF)
    Land Pattern: 90-0187 (PDF)
    Use pkgcode/variation: X4-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX4786EXS+T    
    		Active SC70;4 pin;5 mm²
    Outline Drawing: 21-0098 (PDF)
    Land Pattern: 90-0187 (PDF)
    Use pkgcode/variation: X4+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX4787 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX4787EXS+T    
    		Active SC70;4 pin;5 mm²
    Outline Drawing: 21-0098 (PDF)
    Land Pattern: 90-0187 (PDF)
    Use pkgcode/variation: X4+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX4787EXK+TC7Q    
    		Active SC70;5 pin;5 mm²
    Outline Drawing: 21-0076 (PDF)
    Land Pattern: 90-0188 (PDF)
    Use pkgcode/variation: X5+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX4787EXK+  
    		Active SC70;5 pin;5 mm²
    Outline Drawing: 21-0076 (PDF)
    Land Pattern: 90-0188 (PDF)
    Use pkgcode/variation: X5+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX4787EXK  
    		Active SC70;5 pin;5 mm²
    Outline Drawing: 21-0076 (PDF)
    Land Pattern: 90-0188 (PDF)
    Use pkgcode/variation: X5-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX4787EXS-T    
    		Active SC70;4 pin;5 mm²
    Outline Drawing: 21-0098 (PDF)
    Land Pattern: 90-0187 (PDF)
    Use pkgcode/variation: X4-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX4787EXK-T    
    		Active SC70;5 pin;5 mm²
    Outline Drawing: 21-0076 (PDF)
    Land Pattern: 90-0188 (PDF)
    Use pkgcode/variation: X5-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX4787EXK+T    
    		Active SC70;5 pin;5 mm²
    Outline Drawing: 21-0076 (PDF)
    Land Pattern: 90-0188 (PDF)
    Use pkgcode/variation: X5+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX4788 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX4788EXS+  
    		Active SC70;4 pin;5 mm²
    Outline Drawing: 21-0098 (PDF)
    Land Pattern: 90-0187 (PDF)
    Use pkgcode/variation: X4+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX4788EXS+T    
    		Active SC70;4 pin;5 mm²
    Outline Drawing: 21-0098 (PDF)
    Land Pattern: 90-0187 (PDF)
    Use pkgcode/variation: X4+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX4788EXS-T    
    		Active SC70;4 pin;5 mm²
    Outline Drawing: 21-0098 (PDF)
    Land Pattern: 90-0187 (PDF)
    Use pkgcode/variation: X4-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis

    Related Products
    MAX890, MAX890L 1.2A, Current-Limited, High-Side P-Channel Switch with Thermal Shutdown
    MAX4789, MAX4790, MAX4791, MAX4792, MAX4793, MAX4794 200mA/250mA/300mA Current-Limit Switches

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    Document Ref.: 19-2664; Rev 1; 2003-05-26
    This page last modified: 2009-10-14


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