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ADP2381 Recommended for New Designs
The ADP2381 is a current mode control, synchronous, step-down, dc-to-dc regulator. It integrates a 44 m? power MOSFET and a low-side driver to provide...
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ADP2381 on Analog.com

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ADIsimPower ADP238x parameters



		

			

									
					    peter.clerico
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on May 20, 2016 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    I am using the ADIsimPower ADP238x tool for an ADP2381 buck design.  The "Thermal Performance" block on the spreadsheet shows the package thermal resistance is ~183C/W, but the device data sheet shows this is really 39.48C/W.  The higher number is used to calculate temp rise at the regulator, which (I believe) is now incorrect.
    
 
    Can the parameter on the tool be corrected?  Have I missed something fundamental?
    
 
    thx
    
									
			        
		
    

				
						
        

    
    Tags: 
                                            
                 ADP2381
                
                                                    
                 Internal Power Switch Buck Regulators
                
                                                    
                 adisimpower
                
                                                    
                 Step-Down (Buck) Regulators
                
                                
            
    
    
    

		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    


	















    
	
    
	
    
					



			


				
	









	
      
	

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      •  Analog Employees  
      
            
			                            
                                                                                                                        
            
				
			
            
					
      
	
      

		
		
      
					
      Hello,
      
 
      Thanks for finding the error. The tool is using the correct Tja for the part so the IC temperature predicted is correct.  However the Tja shown is not correct.  The tool will be updated very soon to reflect the changes.  On a related note, the IC loss in the loss table is also currently shown incorrectly since it does not include switching loss and RDSon loss.  The total loss is correct though.
      
 
      Regards,
      
 
      Kevin
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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      •  Analog Employees  
      
            
			                            
                                                                                                                        
            
				
			
            
					
      
	
      

		
		
      
					
      This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

      Thank you,
      EZ Admin
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
				
						
						
				
				
		
		
      
			
		
      
	
      

      

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