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ADUM4165 Recommended for New Designs
The ADuM4165/ADuM41661 are USB 2.0 port isolators, utilizing Analog Devices, Inc., iCoupler® technology to dynamically support all USB 2.0 data rates;...
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ADUM4165 on Analog.com

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VDD2 = 5.5 V when power on

		
	
				

			

									
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				                on Jan 12, 2025 
				
			
			
		
    
		
		                     
				
        		
    
		    
		    		    
    
		      		            		        
    Category: Hardware
    
    		        		            		    
    Product Number:  ADUM4165  
    
    		        		    		    
    
		    		    
		    			
    
			    
    Hi there, 
    

    

    

    

    

    

    

    I am working on a USB isolator based on the ADUM4165. However, when I apply 5.5V to VBUS2, VDD2 is not behaving as expected. Instead of outputting 3.3V, it is showing 5.5V, which is equal to the VBUS2 voltage.
    

    

    

    

    

    

    

    

    Any suggestions will be appreciated.
    

    

    Thanks in advance.
    
			
    
			
									
		                             
                        

    
    
                                            
                 hardware
                
                                                    
                 Digital Isolation Technology
                
                                                    
                 ADuM4165
                
                                                    
                 USB isolators