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ADP2164 Recommended for New Designs
The ADP2164 is a 4 A, synchronous, step-down dc-to-dc regulator in a compact 4 mm × 4 mm LFCSP package. The regulator uses a current mode, constant frequency...
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ADP2164 on Analog.com

ADP2384 Recommended for New Designs
The ADP2384 is a synchronous, step-down dc-to-dc regulator with an integrated 44 m?, high-side power MOSFET and an 11.6 m?, synchronous rectifier MOSFET...
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ADP2384 on Analog.com

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About the Absolute Maximum Ratings of the ADP2164 SW Pin

		
	
				

			

									
					    naohisa
					
							

            
            			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Feb 9, 2024 
				
			
			
		
    
		
		                     
				
        		
    
		    
		    		    
    
		      		            		        
    Category: Datasheet/Specs
    
    		        		            		    
    Product Number:  ADP2164  
    
    		        		    		    
    
		    		    
		    			
    
			    
    Hi,
    

    I have a question, please let me know.
    

    The absolute maximum ratings of ADP2164 are as follows.
    

    https://www.analog.com/media/en/technical-documentation/data-sheets/ADP2164.PDF#page=5
    

    

     
    

    

    On the other hand, the SW pin waveform described in the data sheet has an undershoot on the negative side to around -1V.
    

    I think it will exceed the absolute maximum ratings, but is there a problem?
    

    Or is there a specification that says there is no problem as long as it is momentary?
    

    https://www.analog.com/media/en/technical-documentation/data-sheets/ADP2164.PDF#page=10
    

    

     
    

    

    For example, the ADP2384, a power supply from the same ADI company, had this description.
    "SW 10ns Transient", "SW 100ns Transient"
    

    Does ADP2164 also have such specifications?
    

    https://www.analog.com/media/en/technical-documentation/data-sheets/ADP2384.pdf#page=5
    

     
    

    

    Best Regards,
    

    Naohisa
    
			
    
			
									    
    
			        
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[edited by: naohisa at 6:14 AM (GMT -5) on 9 Feb 2024]
				
    
						
		                             
                        

    
    
                                            
                 Datasheet/Specs
                
                                                    
                 Internal Power Switch Buck Regulators
                
                                                    
                 adp2164
                
                                                    
                 adp2384
                
                                                    
                 Step-Down (Buck) Regulators
                
                                
            
    
    
    
		
    

				
				        
        		
    
			
						
									
												
			
			
                        
                                    
                        
                                                    
                        
            
			            
						
						
			
			
			
			
		
    

        
        
        
    
					
    
			
    


    
















    
	
    
	
    
					



			


				
	









	
      
	

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      •  Analog Employees  
      
            
						
                            
            
            				
            
                on Feb 16, 2024 9:24 PM
            
            
						
			            		
      
		
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      Hi,
      

      See my responses below.
      

      

      On the other hand, the SW pin waveform described in the data sheet has an undershoot on the negative side to around -1V. I think it will exceed the absolute maximum ratings, but is there a problem?
      

      

      >>> This should be ok. The negative spike on the waveform is mainly due to bond wire and PCB trace inductances (test measurement point). Most of the negative spikes that we see gets dropped across the SW and PGND bond wires and PCB traces. You may want to try to adjust your test set-up and see that the measurement values will change as well.
      

      

      Or is there a specification that says there is no problem as long as it is momentary?
      

      For example, the ADP2384, a power supply from the same ADI company, had this description.
      "SW 10ns Transient", "SW 100ns Transient"
      

      Does ADP2164 also have such specifications?
      

      

      >>>During development, some customers would specify their requirements for negative transients like in the case for ADP2384. We don't have those for ADP2164, but this should not be a concern as for the reasons i have stated above.
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
				
				
				
		
		
      
			
		
      
	
      

      

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