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ADP5091 Production
The ADP5091/ADP5092 are intelligent, integrated energy harvesting, ultralow power management unit (PMU) solutions that convert dc power from PV cells or...
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ADP5091 on Analog.com

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ADP5091 BACK_UP pin and cold start



		

			

									
					    Bacterius
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Dec 2, 2021 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    Hi,
    

    In my ADP5091 design I have grounded BACK_UP and SETBK. However this means that on a cold start, even with a full battery, there needs to be some power on VIN to charge SYS using the cold start pump.
    

    Is it safe to connect BACK_UP to BAT (and connect SETBK to AGND) to allow the ADP5091 to draw power from the battery during the cold start? I just need switch S1 in the datasheet to turn on and don't need any other backup features.
    

    Thanks in advance!
    
								
    

				
				
		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    


	















    
	
    
	
    
					



			








	
	
	
	



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