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AD5242 for i2c controlled voltage regulator

		
	
				

			

									
					    ajc
					
							

            
            			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Oct 21, 2011 
				
			
			
		
    
		
		                    	    
    
        	    
    Thread Summary
    
                The user is experiencing issues with the AD5242 digital potentiometer not changing resistance and thus not affecting the output voltage of the LTC3615 linear voltage regulator. The final answer indicates the issue was resolved offline or through a multi-part answer, with no specific solution provided. The accompanying answer requested a schematic for further troubleshooting.
                        	    
    
                
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    Hi,
    
 
    I am using AD5242 in my design as a digipot for controlling one of the feedback resistors on a linear voltage regulator ,LTC3615. I can read and write the i2c values on AD5242, but do not see any resistance change at the output and hence no voltage change at the output of the linear regualtor. Any help appreciated.
    
 
    Thanks,
    
 
    AJC.
    
			
    
			
									
		                             
                        

    
    
                                            
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