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LTC6990 Production
The LTC6990 is a precision silicon oscillator with a programmable frequency range of 488Hz to 2MHz. It can be used as a fixed-frequency or voltage-controlled...
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LTC6990 on Analog.com

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MOSFET driver

		
	
				

			

									
					    ttuDon
					
							

            
            			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Jun 24, 2025 
				
			
			
		
    
		
		                     
				
        		
    
		    
		    		    
    
		      		            		        
    Category: Hardware
    
    		        		            		    
    Product Number:  LTC6990  
    
    		        		    		    
    
		    		    
		    			
    
			    
    I have a LTC6990 that I'd like to use in a flyback circuit.  I'm curious to know if the LTC6990 can directly drive an N-channel MOSFET? 
    

    

    Or will I need a gate driver between the LTC6990 & the MOSFET?
    

    

    Thanks in advance for any help!
    
			
    
			
									
		                             
                        

    
    
                                            
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      •  Analog Employees  
      •  Super User  
      
            
						
                            
            
            				
            
                on Jun 26, 2025 9:49 AM
            
            
						
			            		
      
		
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      Hi, 
      

      Gate capacitance and threshold voltage plays an important role for this desicion. 
      

      LTC6990's output swing level can reach to supply voltage 5.5V max. Therefore, mosfet should have much lower threshold voltage to fully open the mosfet. 
      

      Having a fast rise time improve performance of the system, when the load capacitors increased, the slew rate of the LTC6990's output will be decreased. 
      

      LTSpice has model for LTC6990, you can simulate your sistem or only Mosfet and LTC6990. 
      

      Thanks,
      

      Emrecan
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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