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LTM8063 Recommended for New Designs
The LTM8063 is a 40VIN, 2A continuous, 2.5A peak, step-down µModule® (power module) regulator. Included in the package are the switching controller,...
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LTM8063 on Analog.com

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LTM8063 Vin range for 3.8V Output

		
	
				

			

									
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				                on Mar 26, 2026 
				
			
			
		

		
		                     
				
        		

		    
		    		    

		      		            		        
Category: Datasheet/Specs

    		        		            		    
Product Number:  LTM8063  

    		        		    		    

		    		    
		    			

			    
Hello


I need to design a power stage with 5-24V in rail to a 3.8V output and 1.6A max peak. I fount this device (LTM8063) and I want to know if there are some limitation on the input rail swing. Does the power module fit my application? Can I regulate the 3.8V starting from 5V? And with the same circuit, can I use as is with 24V?




Thanks

			

			
									
		                             
                        

    

                                            
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    •  Analog Employees  
    
            
						
                            
            
            				
            
                on Mar 26, 2026 10:52 AM
            
            
						
			            		
    
		
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    Hi Fabio,
     
    Yes, LTM8063 is a 2A buck micro module silent switcher with 3.2V to 40V input input range and 0.8V to 15V output voltage. This means that it can accept your input voltage range between 5V to 24V and give 5V output, when you connect 45.3kOhms to FB pin as shown in  page  1 of datasheet. 

    I hope this clarified things.
    
			
    

		
			
	      

		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
						
				
				
				
				
		
		
    
			
		
    
	
    

    

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    •  Analog Employees  
    
            
						
                            
            
            				
            
                on Mar 27, 2026 3:41 AM
            
            
						
			            		
    
		
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    Hello,
    

    maybe a little addition to the stated case from Tonyuche with 5V output. At least every buck regulator does need some headroom/difference between Vin and Vout. For your question with 3.8V Vout the 5V Vin,min is sufficient enough to generate a stable 3.8V value for the complete specified output current range of the LTM8063.
    This diagram from the datasheet clears up things further:
     
    So for achieving maximum output current of 2.5A you need Vin>Vout by 700mV.
    Does this help?
    
			
    

		
			
	      

		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
						
				
				
				
				
		
		
    
			
		
    
	
    

    

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