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ADP3050 Not Recommended for New Designs
The ADP3050 is a current mode monolithic buck (step down) PWM switching regulator that contains a high current 1 A power switch and all control, logic...
Datasheet
ADP3050 on Analog.com

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ADP3050 INVERTING (BUCK BOOST) REGULATOR

		
	
				

			

									
					    sss
					
							

            
            			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Nov 6, 2017 
				
			
			
		
    
		
		                     
				
        		
    
		    
		    		    
		    			
    
			    
    Hi all,
    
 
    "ADP3050 Buck Regulator Design Tool" can not design the ADP3050 in a buck-boost configuration that produces a negative output voltage from a positive input voltage.
    
 
    In the datasheet 18 page, "INVERTING (BUCK BOOST) REGULATOR"
    The circuit in Figure 29 shows the ADP3050 in a buck-boost configuration.
    
 
    For example, following output setting is available for ADP3050?
    VIN:+5.0V
    VOUT:-12.0V
    IOUT:0.5~1A ;need to set less current ?
    
 
    Best regards,
    sss
    
			
    
			
									
		                             
                        

    
    
                                            
                 Internal Power Switch Buck Regulators
                
                                                    
                 inverting buck boost
                
                                                    
                 adp3050
                
                                                    
                 adisimpower
                
                                                    
                 Step-Down (Buck) Regulators
                
                                
            
    
    
    
		
    

				
				        
        		
    
			
						
									
												
			
			
                        
                                    
                        
                                                    
                        
            
			            
						
						
			
			
			
			
		
    

        
        
        
    
					
    
			
    


    
















    
	
    
	
    
					



			








	
	
	
	



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      •  Analog Employees  
      
            
						
                            
            
            				
            
                on Nov 7, 2017 6:58 AM
            
            
						
			            		
      
		
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      Hello,
      
 
      when you follow the math on page 18 you will see that the available output current for a +5V to -12V application is less than 250mA, hence, for more output power you need a part with a bigger switch rating. Once you have to go away from the ADP3050 you should look for a more modern part with higher and maybe adjustable switching frequency. The ADP2380 should be an candidate. Look for Vin,min (4.5V) and the Absmax. There is a design tool for an inverting BuckBoost topology available for the ADP238X family.
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
						
				
				
				
		
		
      
			
		
      
	
      

      

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      •  Analog Employees  
      
            
						
                            
            
            				
            
                on Nov 7, 2017 6:58 AM
            
            
						
			            		
      
		
										0
					
	
      

		
		
      
		
      
                                
                                                            
      
					
      Hello,
      
 
      when you follow the math on page 18 you will see that the available output current for a +5V to -12V application is less than 250mA, hence, for more output power you need a part with a bigger switch rating. Once you have to go away from the ADP3050 you should look for a more modern part with higher and maybe adjustable switching frequency. The ADP2380 should be an candidate. Look for Vin,min (4.5V) and the Absmax. There is a design tool for an inverting BuckBoost topology available for the ADP238X family.
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
						
				
				
				
		
		
      
			
		
      
	
      

      

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