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LT83402 Recommended for New Designs
The LT®83401/LT®83402 synchronous step-down regulator is uniquely designed to combine an ultralow- noise reference with Silent Switcher architecture...
Datasheet
LT83402 on Analog.com

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LT83402 footprint

		
	
				

			

									
					    johnpritchard
					
							

            
            			
				
									
											
			
			
				
			
			
			    	
			                    
                
				                on Apr 13, 2026 
				
			
			
		

		
		                     
				
        		

		    
		    		    

		      		            		        
Category: Datasheet/Specs

    		        		            		    
Product Number:  LT83402  

    		        		    		    

		    		    
		    			

			    
 


Hi ADI,


Please see my clip of the recommended footprint attached. The dimensions circled in red seem inconsistent? Please can you confirm? What are the correct dimensions?


The suffix "BSC" encircled in blue seem in error? I assume these suffixes should not be there?

			

			
									    

			        
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[edited by: johnpritchard at 11:56 AM (GMT -4) on 15 Apr 2026]
				

						
		                                 
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                 Datasheet/Specs
                
                                                    
                 LT83402
                
                                                    
                 switching regulators
                
                                                    
                 footprint dimensions
                
                                
            

    
    
		


				
				        
        		

			
						
									
												
			
			
                        
                                    
                        
                                                    
                        
            
			            
						
						
			
			
			
			
		


        
        
        
    
					

			





















	

	

					



			


				
	









	
    
	

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    •  Analog Employees  
    
            
						
                            
            
            				
            
                on Apr 16, 2026 6:00 AM
            
            
						
			            		
    
		
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    Hello,
     
    The outline dimension drawing is correct. The component dimension is different from the recommended solder pad layout. Solder pad will be on your PCB which are slightly bigger from the package dimension. The BSC is correct also, this is the pitch between pads. Can you clarify further your confusion on the drawing?
    
			
    

		
			
	      

		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
						
				
				
				
				
		
		
    
			
		
    
	
    

    

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                on Apr 16, 2026 7:27 AM
            
            
						
			            		
    
		
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    Hi Tonie
    

    Thanks for taking the time to reply.
    

    Please see the items highlighted in red in my drawing. If the component is 3mm wide and the distance between the outer edge of the pads is 3.5mm, then the distance between the component and edge of pad is surely 0.25mm not 0.06mm?
    

    The BSC designation highlighted in blue in my drawing seems to be referring to a dimension which is the gap between pads in one case and the actual pad width in another. In my understanding BSC is the basic distance between centres as used elsewhere on the same drawing.
    
			
    

		
			
	      

		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
						
				
				
				
				
		
		
    
			
		
    
	
    

    

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