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LTC3315A Recommended for New Designs
The LTC3315A features dual 2A monolithic synchronous step-down converters operating from a 2.25V to 5.5V input supply in one package for space-constrained...
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LTC3315A on Analog.com

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Handling of unused pins of LTC3315A

		
	
				

			

									
					    knj
					
							

            
            			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Apr 19, 2022 
				
			
			
		
    
		
		                     
				
        		
    
		    
		    		    
		    			
    
			    
    Hello
    

    When using the output of LTC3315A with only 1ch, how should the following pins be processed?
    

    ・ Unused terminal
    3: FB2
    4: EN2
    6: SW2
    7: VIN
    

    I would appreciate it if you could reply.
    

    Best Regards,
    Knj
    
			
    
			
									
		                             
                        

    
    
                                            
                 LTC3315A
                
                                                    
                 Step-Down (Buck) Regulators
                
                                                    
                 Multiple Output Buck Regulators
                
                                
            
    
    
    
		
    

				
				        
        		
    
			
						
									
												
			
			
                        
                                    
                        
                                                    
                        
            
			            
						
						
			
			
			
			
		
    

        
        
        
    
					
    
			
    


    
















    
	
    
	
    
					



			


				
	









	
      
	

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      •  Analog Employees  
      
            
						
                            
            
            				
            
                on Apr 19, 2022 8:05 AM
            
            
						
			            		
      
		
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      Hello,
      

      The unused EN and FB should not float and should connect to GND. The VIN pin that supplies the unused regulator is still connected to VIN internally. This pin should connect to VIN and have a decoupling cap on it. A smaller decoupling cap like 0.1uF to 1uf can can be used close to the pin. The bigger bulk cap can be close to the regulator in use. The unused SW node should float.
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
						
				
				
				
		
		
      
			
		
      
	
      

      

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