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MAX20040 Recommended for New Designs
The MAX20039/MAX20040 ICs are a small, synchronous buck-boost converter family with integrated high-side and low-side switches. The MAX20040 is designed...
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MAX20040 on Analog.com

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Some issues about MAX20040

		
	
				

			

									
					    connorboy
					
							


			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Jul 7, 2023 
				
			
			
		
    
		
		                     
				
        		
    
		    
		    		    
    
		      		            		        
    Category: Hardware
    
    		        		            		    
    Product Number:  MAX20040DATPA/VY+T 
    
    		        		    		    
    
		    		    
		    			
    
			    
    Hi,
    

         I meet some issues about MAX20040, please help me!
    

         first,  set input vol to 8~16V and output vol = 12v,
    

      

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      Is there a problem with the schematic?
      

       
      
second, I find some question when I do some tests, why I set the EN low, the voltage of out is 2.4V ? and the current of standby is 30mA around?pls help me,millions of thanks~~
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                 power management
                
                                                    
                 hardware
                
                                                    
                 MAX20040
                
                                                    
                 MAX20040DATPA/VY+T
                
                                                    
                 switching regulators
                
                                        
                                            
                
                
                                        
                                            
                
                
                                
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                on Nov 2, 2023 10:02 AM
            
            
						
			            		
        
		
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        I have same problem with standby current... Datasheet define "Standby Supply Current" to ~52 uA in Skip mode. Skip Mode is not available in all part-numbers and... it works good with 5 Vout, but not with 9 Vout or 12 Vout. Input voltage has no impact to quiescient power.
        

        ~22 mA standby current for 5 Vin and 12 Vout
        

        ~10 mA standby current for 12 Vin and 12 Vout
        

        ~9 mA standby current for 15 Vin and 12 Vout
        

        But... it looks good with 5 Vout.
        

        

        Could someone confirm this issue?
        

        

        Quiescient current is not defined for voltage other than 5 V. Where is the ragne? Where are volt-ampere characteristics for quiescient current related to output voltage?
        

        

        Thanks
        
			
        

		
			
	      

		
		
	
        
	
        
		
        
			
		
        
	
        
	
        
		
						
						
						
				
				
				
		
		
        
			
		
        
	
        

        

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                on Nov 2, 2023 10:02 AM
            
            
						
			            		
          
		
										0
					
	
          

		
		
          
		
          
                                
                                                            
          
					
          I have same problem with standby current... Datasheet define "Standby Supply Current" to ~52 uA in Skip mode. Skip Mode is not available in all part-numbers and... it works good with 5 Vout, but not with 9 Vout or 12 Vout. Input voltage has no impact to quiescient power.
          

          ~22 mA standby current for 5 Vin and 12 Vout
          

          ~10 mA standby current for 12 Vin and 12 Vout
          

          ~9 mA standby current for 15 Vin and 12 Vout
          

          But... it looks good with 5 Vout.
          

          

          Could someone confirm this issue?
          

          

          Quiescient current is not defined for voltage other than 5 V. Where is the ragne? Where are volt-ampere characteristics for quiescient current related to output voltage?
          

          

          Thanks
          
			
          

		
			
	      

		
		
	
          
	
          
		
          
			
		
          
	
          
	
          
		
						
						
						
				
				
				
		
		
          
			
		
          
	
          

          

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