Products Mentioned

LTC3888 Recommended for New Designs
The LTC3888/LTC3888-1/LTC3888-2 is a PMBus-compliant dual loop DC/DC synchronous step-down switching regulator controller with eight expandable phases...
Datasheet
LTC3888 on Analog.com

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LTC3888 in LTpowerCAD



		

			

									
					    Hiroyuki.D
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Jun 15, 2022 
				
			
			
		
    

				
		
    
		    		    
		    
		    		      		            		        
    Category: Hardware
    
    		        		            		    
    Product Number:  LTC3888 
    
    		        		    		    	
			
    Hi,
    

    I'm a DFAE in Japan. Our customer would like to select optimum values for type 2 compensation of LTC3888. However we can't see LTC3888 in LTpowerCAD. Is it not available? If not, please tell me an alternative method.
    

    Regards,
    

    Hiroyuki
    
									
			        
		
    

				
						
        

    
    Tags: 
                                            
                 Buck Regulators with Digital Power System Management
                
                                                    
                 hardware
                
                                                    
                 LTC3888
                
                                                    
                 Step-Down (Buck) Regulators
                
                                
            
    
    
    

		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    
















    
	
    
	
    
					



			








	
	
	
	



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							FormerMember
					
      
		
      
			
													+1
							
			
				
									FormerMember
							        
			
			
			
    
            
						
                            
            
            				
            
                on Jun 15, 2022 7:50 PM
            
            
					
    
	
    

		
		
    
					
    Hello,
    

    As LTC3888 is uses OTA as its compensation, you can use controllers that also use that. But the thing is that the LTC3888 has a programmable internal error amplifier. Maybe you can try using the LTC3871 but it would not be accurate. My advice is that have a predefined value and get a bode plot, and then adjust from there. The datasheet has some information about the loop compensation.
    

    

    Regards,
    

    Jhun
    
			
    

		
			
	      

		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
						
						
						
				
				
		
		
    
			
		
    
	
    

    


	



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    • 
	
      



	
			
		
	



      
	
      
		
      
							FormerMember
					
      
		
      
			
													+1
							
			
				
									FormerMember
							        
			
			
			
    
            
						
                            
            
            				
            
                on Jun 15, 2022 7:50 PM
            
            
					
    
	
    

		
		
    
					
    Hello,
    

    As LTC3888 is uses OTA as its compensation, you can use controllers that also use that. But the thing is that the LTC3888 has a programmable internal error amplifier. Maybe you can try using the LTC3871 but it would not be accurate. My advice is that have a predefined value and get a bode plot, and then adjust from there. The datasheet has some information about the loop compensation.
    

    

    Regards,
    

    Jhun
    
			
    

		
			
	      

		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
						
						
						
				
				
		
		
    
			
		
    
	
    

    





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