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LT8316 Production
The LT8316 is a micropower, high voltage flyback controller. No opto-isolator is needed for regulation. The device samples the output voltage from the...
Datasheet
LT8316 on Analog.com

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Low impedance observed between VIN pin to Gate

		
	
				

			

									
					    AVS
					
							

            
            			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Apr 28, 2026 
				
			
			
		
    
		
		                     
				
        		
    
		    
		    		    
    
		      		            		        
    Category: Hardware
    
    		        		            		    
    Product Number:  LT8316IFE#PBF, LT8316 
    
    		        		    		    
    
		    		    
		    			
    
			    
    Dear Team,
    

    I am using LT8316IFE#PBF for generating 15V from 380V input.
    

    I am facing multiple failures of LT8316IFE#PBF in my circuit, I observed low impedance of 300 Ohms between Vin Pin to Gate pin.
    

    kindly provide guidance.
    

    
			
    
			
									
		                             
                        

    
    
                                            
                 hardware
                
                                                    
                 lt8316
                
                                                    
                 LT8316IFE#PBF
                
                                                    
                 switching regulators
                
                                
            
    
    
    
		
    

				
				        
        		
    
			
						
									
												
			
			
                        
                                    
                        
                                                    
                        
            
			            
						
						
			
			
			
			
		
    

        
        
        
    
					
    
			
    


    
















    
	
    
	
    
					



			








	
	
	
	



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      •  Analog Employees  
      
            
						
                            
            
            				
            
                on May 6, 2026 3:52 AM
            
            
						
			            		
      
		
										0
					
	
      

		
		
      
		
      
                                
                                                            
      
					
      Hi,
      

      Greeting of the day!
      

      Please answer below query to understand the issue:
      

      How many IC you have procured?
      

      Are you procured the IC from ADI authorised distributors?
      

      Are you getting low impedance at all the IC's you procured?
      

      

      Can you share (a) the external MOSFET part number and (b) scope captures (or peak values) of SW node and VGS at turn-off?
      

      

      Regards,
      

      Harshal
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
				
				
				
		
		
      
			
		
      
	
      

      

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      •  Analog Employees  
      
            
						
                            
            
            				
            
                on May 6, 2026 3:52 AM
            
            
						
			            		
      
		
										0
					
	
      

		
		
      
		
      
                                
                                                            
      
					
      Hi,
      

      Greeting of the day!
      

      Please answer below query to understand the issue:
      

      How many IC you have procured?
      

      Are you procured the IC from ADI authorised distributors?
      

      Are you getting low impedance at all the IC's you procured?
      

      

      Can you share (a) the external MOSFET part number and (b) scope captures (or peak values) of SW node and VGS at turn-off?
      

      

      Regards,
      

      Harshal
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
				
				
				
		
		
      
			
		
      
	
      

      

      • 


    


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