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LTC3330 If not using buck-boost converter, float Pins SWA and SWB ?



		

			

									
						PMIC_designer
					
							

			
				
									
											
							 		
		        	            							
			
			    	
			                    
                
				                on Apr 9, 2022 
				
			
			
		


				
		

		    		    
		    
		    	
			
Hi,


I am using the LTC3330 simply as a buck converter for now. I don't intend to use the buck-boost converter and shall be tying its input BAT (Pin #16) to GND. My questions are,


1) Can Pins #14 and #15 be kept floating ? (I want to avoid the buck-boost converter's inductor connected between these two terminals). 


2) Since I am not using buck-boost, can I simply GND the Pins #17, #18 and #19 used to selected the limiting current for the buck-boost converter ? In the demo-board (DC 2048A), these pins are tied to GND via three zero Ohm SMD resistors ? Is it necessary to use these resistors ?


Thank you.

								


				
				
		

			
						
									
									
						
						
			
			
			
			
		


					

			





	










	

	

					



			








	
	
	
	



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													+1
							
			
				
									
							        
            
                                                                                                        
      
                            
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                                 Analog Employees 
                                
                            
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                on Apr 11, 2022 12:11 AM
            
            
					
    
	
    

		
		
    
					
    Hi,
    

    for question 2. Since it is a demoboard, it gives the option of utilizing every function it has, thus it has a zero ohm resistor. These are not necessary if you have a specific design that would not need them.
    

    

    for question 1, please refer to page 25 & 26 of the datasheet. Provided below are the snipped content of the pages.
    

     
    

     
    

    

    Regards,
    

    Jhun
    
			
    

		
		
		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
						
						
						
				
				
		
		
    
			
		
    
	
    

    

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													+1
							
			
				
									
							        
            
                                                                                                        
      
                            
    • 
                                 Analog Employees 
                                
                            
      • 
                        
     
                                                           			
			                            
                        
                on Apr 11, 2022 12:11 AM
            
            
					
    
	
    

		
		
    
					
    Hi,
    

    for question 2. Since it is a demoboard, it gives the option of utilizing every function it has, thus it has a zero ohm resistor. These are not necessary if you have a specific design that would not need them.
    

    

    for question 1, please refer to page 25 & 26 of the datasheet. Provided below are the snipped content of the pages.
    

     
    

     
    

    

    Regards,
    

    Jhun
    
			
    

		
		
		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
						
						
						
				
				
		
		
    
			
		
    
	
    

    

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