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LTC3616 Production
The LTC3616 is a low quiescent current monolithic synchronous buck regulator using a current mode, constant frequency architecture. The no-load DC supply...
Datasheet
LTC3616 on Analog.com

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LTC3616 DC DC converter

		            
		

			

									
					    DarshanTH
					
							


			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Nov 5, 2020 
				
			
			
		
    
		
     
				
		
    
		    		    
		    
		    	
			
    Our Design Required 3.5 Apms @ 3.3V. so we are using "LTC3616" Switching DCDC_Converter Regulator for this. because Our Input volatge is maximum 5V DC.
    

    LTC3616 gives 3.3V  output with out load.
    

    When I connect resistive load 1 ohm 30 watt resistor at the out put  terminals  output voltage reduced to 0.5V.
    

    When I Increased the Resistive load 2E,3, 4E,and 5E Out put voltge varies from 0.5 V to 1.5V.
    

    Afterthat I increased the Resistive load  for 6 Ohms then I am getting 3.3V output .
    

    For getting 3.5 amps for 3.3V what shoukd I configure. kindly suggest.
    

    

    Thanks and RegardsPDF
    
									
			        
		
    

				
						
        

    
    Tags: 
                                            
                 power management
                
                                                    
                 dcdc_converter
                
                                                    
                 DDR/QDR Memory Bus Termination
                
                                                    
                 LTC3616
                
                                                    
                 switching regulators
                
                                        
                                            
                
                
                                
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      •  Analog Employees  
      
            
						
                            
            
            				
            
                on Nov 9, 2020 8:13 PM
            
                                    
												
						in reply to DarshanTH
					
									
      
	
      

		
		
      
					
      Hi DarshanTH,
      

      Thank you for following-up! Your Ith is below 1.05V so it is not triggering the overcurrent protection. However, your SW node is showing interesting graph. Can you check if your source is not limiting the needed current while maintaining 5V?
      

      Can you also share your PCB layout? It is also advisable to minimized your SW node in your PCB layout and avoid overlapping your SW node with ground plane and signal trace to prevent injecting noise especially at high-frequency switching. Thanks!
      

      Regards,
      

      Audi
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
						
						
				
				
		
		
      
			
		
      
	
      

      

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