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LT3050 Recommended for New Designs
The LT3050 series are micro-power, low noise, low dropout voltage (LDO) linear regulators. The devices supply 100mA of output current with a dropout voltage...
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LT3050 on Analog.com

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LT3050 Iout/Imon



		

			

									
					    Yuya
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Jul 23, 2018 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    Hi,
    
 
    My customers are considering using the LT 3050.
    I got an inquiry there.
    
 
    The value of Iout / Imon was measured under the following conditions, and it was measured to be around 87 in actual measurement.
    
 
    Calculation using the calculation formula of data sheet P.15 resulted in about 95.5,
    Calculation and measurement are different.
    
 
    # 1 　Is there graph data etc of Iout / Imon at low output current (@ Iout = 5 mA)?
    
 
    # 2 　Is there anything that can be considered as a reason why the numerical values differ between actual
    
 
    　　　measurement and calculation?
    
 
    ＜Conditions＞
    
 
    VIN: 10 V
    VOUT: 5.3 V
    IOUT: 5 mA
    VIMON: 1 V
    
 
    Best Regards,
    
 
    Yuya
    
									
			        
		
    

				
				
		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    


	
    
		
	
    















    
	
    
	
    
					



			








	
	
	
	



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													0
							
			
				
									
							        
			
			
			
        
            
			                            
                        
                on Jul 24, 2018 5:34 AM
            
            
					
        
	
        

		
		
        
					
        Hi, MollyZhu
        
 
        Thank you for your answer.
        
 
        "the accuracy of the ratio changes under light load."
        
 
        ＞＞Is it pointing to a place slightly rising at the light load (around <10 mA) in the data sheet P. 11 or 12 graph?
        　　Does that mean that it changes slightly from IMON: IOUT = 100: 1?
        
 
        Check output current, voltage waveform of VIMON.
        Although the ratio is 96.5, can you calculate by the following equation?
        
 
        
 
        Best regards,
        
 
        Yuya
        
			
        

		
			
	      

		
		
	
        
	
        
		
        
			
		
        
	
        
	
        
		
						
						
				
						
				
				
		
		
        
			
		
        
	
        

        

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													0
							
			
				
									
							        
			
			
			
          
            
			                            
                        
                on Jul 24, 2018 5:34 AM
            
            
					
          
	
          

		
		
          
					
          Hi, MollyZhu
          
 
          Thank you for your answer.
          
 
          "the accuracy of the ratio changes under light load."
          
 
          ＞＞Is it pointing to a place slightly rising at the light load (around <10 mA) in the data sheet P. 11 or 12 graph?
          　　Does that mean that it changes slightly from IMON: IOUT = 100: 1?
          
 
          Check output current, voltage waveform of VIMON.
          Although the ratio is 96.5, can you calculate by the following equation?
          
 
          
 
          Best regards,
          
 
          Yuya
          
			
          

		
			
	      

		
		
	
          
	
          
		
          
			
		
          
	
          
	
          
		
						
						
				
						
				
				
		
		
          
			
		
          
	
          

          

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