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LTC3601 Production
The LTC3601 is a high efficiency, monolithic synchronous buck regulator using a phase-lockable controlled on-time, current mode architecture capable of...
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LTC3601 on Analog.com

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LTC3601 switching reg issue



		

			

									
					    oyz
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Jul 5, 2019 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    Hi,
    

    We are testing 5 sets of PCB containing 2 LTC3601EMSE ICs each.
    

    One of them seems burn out during out long term test. 
     The test was signaling to pin 12(RUN, 3.3V) 6-hour on-and-off every 3 sec.
    

    It was hot and output 0V when it was out-of-order.
    

    Note that pin 6 (INTVCC) output 5V when it comes to out-of-order. It should out 3.3V.
    

    I want to get advised relating our schematics in terms of safty and protection.
    

    

    Thanks,
    

    jo
    

    

    

     
    
										

    
				edited title
    
[edited by: JValeriani at 7:18 PM (GMT 0) on 8 Jul 2019]
				
    
					
    

				
				
		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    


	
    
		
	
    















    
	
    
	
    
					



			


				
	









	
      
	

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													+1
							
			
				
									
							        
			
			
			
      •  Analog Employees  
      
            
			                            
                        
                on Jul 29, 2019 9:06 AM
            
            
					
      
	
      

		
		
      
					
      Can you tell me what is Estimate Annual Usage of your project and what company do you work for?
      

      If component is damaged during turn-on and off, there could be voltage transient that went above the Abs. Max rating of the part. Please check these using oscilloscope. You may also want to contact local ADI sales or FAE for support.
      
			
      

		
		
		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
				
						
						
				
				
		
		
      
			
		
      
	
      

      

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