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Products Mentioned

LT3042 Recommended for New Designs
The LT3042 is a high performance low dropout linear regulator featuring LTC’s ultralow noise and ultrahigh PSRR architecture for powering noise sensitive...
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LT3042 on Analog.com

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Design idea for high stable , low noise +5V using the LT3042

		
	
				

			

									
					    Aravind601
					
							

            
            			
				
									
											
			
			
				
			
			
			    	
			                    
                
				                on Sep 2, 2025 
				
			
			
		

		
		                     
				
        		

		    
		    		    

		      		            		        
Category: Hardware

    		        		            		    
Product Number:  lt3042 

    		        		    		    

		    		    
		    			

			    
Hello,


  I am using the LT3042 for an ultra-clean ,  high stable 5V supply for my analog circuit .  I have followed the design of application circuit , but I'm unable to get clean 5V i have jumping from 1mV range . please verify my circuit and help me with design   

			

			
									
		                             
                        

    

                                            
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    •  Analog Employees  
    
            
						
                            
            
            				
            
                on Sep 15, 2025 5:34 PM
            
            
						
			            		
    
		
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    A few questions to try to help you in this:

    1) Is your load going up and down?
    


    2) Is your input going up and down?
    

    

    (1 & 2 - if you could provide an oscilloscope plot showing VIN, VOUT, and IOUT, that would be most helpful)
    


    3) Can you show your circuit board layout?
    
			
    

		
			
	      

		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
						
				
				
				
				
		
		
    
			
		
    
	
    

    

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