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ADP323 Recommended for New Designs
The ADP322/ADP323 200 mA triple output LDOs combine high PSRR, low noise, low quiescent current, and low dropout voltage to extend the battery life of...
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ADP323 Pulsing Spikes



		

			

									
					    K.T.Eng
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Oct 28, 2014 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    I have the schematic below, which i have created with the ADI Linear Regulators Excel tool.
    
 
    I am producing Vout 1 = 2.8 Volts 
    
 
                             Vout 2 = 2.5 Volts 
    
 
                             Vout 3 = 1.8 Volts
    
 
    I am pulsing the EN1 at 4Hz to drive a circuit but pulsing AC spikes exactly at 4Hz appear at the GND, VIN, Vout 1, Vout 2 , Vout 3  , around -/+20mV .
    
 
      
    
 
    
 
    Can you please help me eradicate that issue as soon as possible.
    
 
    I am not exactly sure what is causing the issue, I am pulsing the EN1 directly from a pin of a MCU.
    
 
    Thanks in advance. 
    
								
    

				
				
		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    


	
    
		
	
    















    
	
    
	
    
					



			








	
	
	
	



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