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LT3083 Recommended for New Designs
The LT3083 is a 3A low dropout linear regulator that can be paralleled to increase output current or spread heat on surface mounted boards. Architected...
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LT3083 on Analog.com

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How can we simulate loop gain of LT3083?

		
	
				

			

									
					    Satoru
					
							

            
            			
				
									
											
			
			
				
  •  Analog Employees  

			
			
			    	
			                    
                
				                on Jul 17, 2024 
				
			
			
		

		
		                     
				
        		

		    
		    		    

		      		            		        
Category: Hardware

    		        		            		    
Product Number:  LT3083  

    		        		    		    

		    		    
		    			

			    
Hello,


I would like to simulate loop gain of LT3083 on LTspice.


Since there is no external feedback path on LT3083, it is difficult to measure its loop gain using FRA tool in LTspice.


How can we simulate its loop gain with alternative or similar way?


 


Please advise.

			

			
									
		                             
                        

    

                                            
                 hardware
                
                                                    
                 LTspice
                
                                                    
                 loop gain
                
                                                    
                 LT3083
                
                                                    
                 LDO Linear Regulators
                
                                        
                                            
                
                
                                
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    •  Analog Employees  
    
            
						
                            
            
            				
            
                on Jul 17, 2024 2:06 PM
            
            
						
			            		
    
		
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    Hi.  I am not aware of a way to break the loop of the LT3083 so the FRA tool can be used.  I check stability of devices like the LT3083 by doing a load transient test.  I am not sure if the load transient test can provide a rough estimate of loop gain.  
    
			
    

		
			
	      

		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
						
				
				
				
				
		
		
    
			
		
    
	
    

    

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