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ADP2442 Recommended for New Designs
The ADP2441 / ADP2442 is a constant frequency, current mode control, synchronous, step-down, dc-to-dc regulator that is capable of driving loads of up...
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ADP2442 on Analog.com

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ADP2442 shutdown output after some seconds



		

			

									
					    staticboards
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Jan 30, 2018 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    Hi!
    
 
    We are evaluating the ADP2442 ic. Our prototype is a basic dc dc converter, from 24V to 5V
    
 
    This is the schematic (basically a copy&paste of the reference design):
    
 
    
 
    If we connect the pin 6 (SYNC/MODE) to gnd (pulse skip mode), the circuit seems to work. We have 5V and we can supply current for a test load.
    
 
    But if we use the fixed mode (pin 6 to vcc), the circuit works for a couple of seconds, and then, it shutdowns. We were looking for something strange, but at first, we dont see anything.
    
 
    any idea or suggestion?
    
 
    Thank you very much!!!