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LTM4625 Recommended for New Designs
The LTM4625 is a complete 5A step-down switching mode µModule (Power Module) regulator in a tiny 6.25mm × 6.25mm × 5.01mm BGA package. Included in the...
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LTM4625 on Analog.com

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LTM4625 switching frequency



		

			

									
					    hkoike
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Sep 7, 2023 
				
			
			
		
    

				
		
    
		    		    
		    
		    		      		            		        
    Category: Datasheet/Specs
    
    		        		            		    
    Product Number:  LTM4625 
    
    		        		    		    	
			
    I'm designing schematic with LTM4625 now.
    I used LTPowerCAD and saw warning in iL Ripple at 1000KHz fsw.
    I changed fsw to 860KHz, then the warning turned to right range (21%).
    I saw the datasheet and calculated, then the resister value was 2M ohm.
    Am I right?
    LTPowerCAD display differently, so I'm confused.
    

    

     
    
									
			        
		
    

				
						
        

    
    Tags: 
                                            
                 µModule Buck Regulators
                
                                                    
                 Datasheet/Specs
                
                                                    
                 µModule Regulators
                
                                                    
                 LTM4625
                
                                
            
    
    
    

		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    
















    
	
    
	
    
					



			


				
	









	
      
	

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      •  Analog Employees  
      
            
						
                            
            
            				
            
                on Sep 12, 2023 1:24 AM
            
            
					
      
	
      

		
		
      
					
      Hi  ,
      

      Sorry for the confusion, please follow the datasheet calculations.
      Note, the 'Rfreq' value shown in the LTM4625 LTpowerCAD schematic refers to the resistor from FREQ pin to GND only.
      FYI, an update has just been made to now also include 'Rfreq2' in the LTM4625 LTpowerCAD schematic for the frequency setting resistor between FREQ pin and INTVCC (also see screenshot below for the updated schematic for reference).
      

      Please click 'Sync/Release' to get the latest.
      

      Thanks!
      

       
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
				
						
						
				
				
		
		
      
			
		
      
	
      

      

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