Products Mentioned

LTC3260 Recommended for New Designs
The LTC3260 is a low noise dual polarity output power supply that includes an inverting charge pump with both positive and negative LDO regulators. The...
Datasheet
LTC3260 on Analog.com

LTC3265 Recommended for New Designs
The LTC3265 is a low noise dual polarity output power supply including a boost charge pump, an inverting charge pump and two low noise positive and negative...
Datasheet
LTC3265 on Analog.com

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DCDC converter with dual supply

		
	
				

			

									
					    Clt
					
							

            
            			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on May 16, 2022 
				
			
			
		
    
		
		                     
				
        		
    
		    
		    		    
    
		      		            		        
    Category: Software
    
    		        		            		    
    Product Number:  DCDC converter with dual supply 
    
    		        		    		    
    
		    		    
		    			
    
			    
    Hi,
    

    May I know if ADI has any similar component for LTC3260?
    

    Was thinking whether the LTC3265 can be used as an alternative solution as LTC3260..
    

    Input 24V, output >±12V
    

    

    Thanks. 
    
			
    
			
									    
    
			        
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[edited by: Clt at 4:31 AM (GMT -4) on 17 May 2022]
				
    
						
		                             
                        

    
    
                                            
                 software
                
                                                    
                 Regulated Inverting Charge Pumps
                
                                                    
                 DCDC converter with dual supply
                
                                                    
                 LTC3260
                
                                                    
                 Inductorless (Charge Pump) DC/DC Converters
                
                                        
                                            
                
                
                                
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							FormerMember
					
      
		
      
		    
		    		    
			
				
									FormerMember
							        
			
			
			
    
            
						
                            
            
            				
            
                on May 16, 2022 11:06 PM
            
            
						
			            		
    
		
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    Hello,
    

    You won't be able to use the LTC3265 as its input supply is only rated up to 16V for VIn_P. Is your input fixed at 24V?
    
			
    

		
			
	      

		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
						
				
				
				
				
		
		
    
			
		
    
	
    

    


	

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                on May 16, 2022 11:11 PM
            
            
												
						in reply to FormerMember
					
										
			            		
      
		
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      Hi Jhun,
      

      Thanks for your prompt response.
      

      Yes the current voltage input is fixed at 24V. 
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
				
				
				
		
		
      
			
		
      
	
      

      

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      •  Analog Employees  
      
            
						
                            
            
            				
            
                on May 16, 2022 11:30 PM
            
            
						
			            		
      
		
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      Hi Clt,
      

      LTC3265 has a boost charge pump which only has a max input of 16V. It also means you cannot produce a stepped down +12V output.
      

      However, the inverting charge pump can take 24V input and produce -12V output through the negative LDO.
      

      You can try looking for charge pumps from this table: Selection Table for Inductorless (Charge Pump) DC/DC Converters | Parametric Search | Analog Devices
      

      You can also look into LTM4655 which can operate within your desired specs: LTM4655 Datasheet and Product Info | Analog Devices
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
						
				
				
				
		
		
      
			
		
      
	
      

      

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