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          EEPW首頁 
	 > 模擬技術 > 設計應用 > 模擬集成電路的低電壓系統(tǒng)-Analog ICs for Lo
          
    
          

          

          


	
	
	

          
	
          
		
          
			
          模擬集成電路的低電壓系統(tǒng)-Analog ICs for Lo
          
						
          
				作者：
				時間：2012-01-30
				來源：網(wǎng)絡
				
				
				
				
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			"PADDING-RIGHT: 0px; PADDING-LEFT: 0px; PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-TOP: 0px">MAX1589MAX1818MAX1589MAX1818MultiplexersMAX4638MAX4638MAX4639MAX4701Op Amps, FastMAX4291MAX410MAX4489MAX4489Op Amps, Low CurrentMAX4036MAX4036MAX4036MAX4036Op Amps, Low OffsetMAX480MAX4236AMAX4238MAX4238Real-Time ClocksDS1375DS1375DS1375DS1375ReferencesMAX6018AMAX6029MAX6029MAX6029RS-232MAX218MAX3381EMAX3322EMAX3232ERS-485
          —
          MAX3471MAX3471MAX3076EUSBMAX3453MAX3453MAX3453MAX3453
          Power Savings from Low-Voltage Operation
          The power saved by reducing a system supply voltage from 5V to a lower value can be dramatic. For resistive and capacitive loads, power saved is proportional to the voltage squared. For constant-current loads such as references and op amps, the savings are linear. For constant-power loads such as hard-disk drives, the switch to low voltage does not save power, but requires the device to operate at a lower input voltage. Table 2 summarizes the power savings offered by lower voltage systems as compared to 5V systems.

          Table 2. Power Savings Compared to 5V When Using Lower Voltages
          Load TypePower-Savings
          Formula          		Power Savings Compared to 5V (%)
          1.8V
          Operation          		2.5V
          Operation          		3V
          Operation          		3.3V
          Operation
          Resistive(1 - (V / 5)2) x 10087756456
          Capacitive(1 - (V / 5)2) x 10087756456
          Constant Current(V / 5) x 100645040
				
          
					
					
		  			
		  			
					
				
          
			
                
			
								
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