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MAX40200 Production
The MAX40200 is an ideal diode current-switch that drops so little voltage that it approaches an order of magnitude better than Schottky diodes. When...
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MAX40200 on Analog.com

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What happens when VDD is not powered and voltage is injected into the VOUT pin?

		
	
				

			

									
					    Tomisin
					
							

            
            			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Feb 26, 2025 
				
			
			
		
    
		
		                     
				
        		
    
		    
		    		    
    
		      		            		        
    Category: Datasheet/Specs
    
    		        		            		    
    Product Number:  MAX40200  
    
    		        		    		    
    
		    		    
		    			
    
			    
    Is there isolation between VIN and VOUT on power off?
    
			
    
			
									
		                             
                        

    
    
                                            
                 Datasheet/Specs
                
                                                    
                 and Protection
                
                                                    
                 MAX40200
                
                                                    
                 power monitor
                
                                                    
                 Ideal Diodes
                
                                        
                                            
                
                
                                        
                                            
                
                
                                        
                                            
                
                
                                
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      •  Super User  
      
            
						
                            
            
            				
            
                on Feb 27, 2025 1:28 AM
            
            
						
			            		
      
		
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      Hi,
      this is a good question. As for the enable pin it is clearly stated, that it blocks both ways.
      But as there is a strange symbol regarding bulk diode, all this internal circuitry will not work.
      I would guess that esd protection diode from Vout to Vdd will conduct, effectively powering the device.
      But how it behaves in this mode, remains unknown to me.

      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
				
				
				
		
		
      
			
		
      
	
      

      

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