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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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input current consumption

		
	
				

			

									
					    Sandip515
					
							

            
            			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Jul 16, 2025 
				
			
			
		
    
		
		                     
				
        		
    
		    
		    		    
    
		      		            		        
    Category: Datasheet/Specs
    
    		        		            		    
    Product Number:  LTC3265  
    
    		        		    		    
    
		    		    
		    			
    
			    
    Hi,
    

    I want to know how to calculate input current of LTC3265. I considered IVIN_P Quiescent current = 6mA,IVIN_N Quiescent current = 5mA.
    

    We have Vin 15V,
    

    Vout LDO + 18.7, 37mA
    

    Vout LDO-  -5.7,17mA.
    

    what is input current ?
    
			
    
			
									
		                             
                        

    
    
                                            
                 Datasheet/Specs
                
                                                    
                 Regulated Inverting Charge Pumps
                
                                                    
                 Inductorless (Charge Pump) DC/DC Converters
                
                                                    
                 ltc3265
                
                                
            
    
    
    
		
    

				
				        
        		
    
			
						
									
												
			
			
                        
                                    
                        
                                                    
                        
            
			            
						
						
			
			
			
			
		
    

        
        
        
    
					
    
			
    


    
















    
	
    
	
    
					



			


				
	









	
      
	

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      •  Analog Employees  
      
            
						
                            
            
            				
            
                on Jul 16, 2025 8:57 AM
            
            
						
			            		
      
		
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      Hello,
      

      The input current for the VOUT+ charge pump is 2x IOUT+ + Iq for VINP. IOUT+ is ILDO+ (If VIN_N and VIN_P are both connected to the same supply.) The input current for VOUT- is ILDO- + Iq VIN_N. The input current should be close to 6mA + 2x 37mA + 5mA + 17mA = 102mA. This did not include the current in the FB network or other pull-down currents in the circuit. 
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
				
				
				
		
		
      
			
		
      
	
      

      

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