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LTM4700输出0.85V纹波过大的问题

		
	
				

			

									
					    DAWNFAKE
					
							

            
            			
				
									
											
			
			
				
			
			
			    	
			                    
                
				                on Oct 14, 2025 
				
			
			
		

		
		                    	    

        	    
Thread Summary

                The user is experiencing high ripple on the 0.85V output of the LTM4700. The final answer suggests increasing the output capacitance, referencing the DC2702B evaluation board schematic. Additionally, to modify the frequency, the channel must be in the off state.
                        	    

                
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问题1.LTM4700输出0.85V的纹波很大，原理图与0.85电源纹波状态图如下。


问题2.使用了LTPOWERPLAY调试，频率没办法更改。调整其他课调参数，纹波情况没有改善。频率有办法修改吗？


  

			

			
									
		                             
                        
		


				
				        
        		

			
						
									
												
			
			
                        
                                    
                        
                        
                        
            
			            
						
						
			
			
			
			
		


        
        
        
    
					

			





















	

	

					



			


				
	









	




	
			








		

		

			
    
				
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