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	 > 模擬技術(shù) > 設(shè)計應用 > MAX1790, MAX8715 低噪聲、升壓型DC-DC轉(zhuǎn)
          
    
          

          

          


	
	
	

          
	
          
		
          
			
          MAX1790, MAX8715 低噪聲、升壓型DC-DC轉(zhuǎn)
          
						
          
				作者：
				時間：2011-08-23
				來源：網(wǎng)絡
				
				
				
				
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          MAX1790, MAX8715 pdf datasheet 
          MAX1790, MAX8715 概述 
          The MAX1790/MAX8715 boost converters incorporate high-performance (at 1.2MHz), current-mode, fixed-frequency, pulse-width modulation (PWM) circuitry with a built-in 0.21Ω /0.15Ω n-channel MOSFET to provide a highly efficient regulator with fast response.

          High switching frequency (640kHz or 1.2MHz selectable) allows easy filtering and faster loop performance. An external compensation pin provides the user flexibility in determining loop dynamics, allowing the use of small, low equivalent-series-resistance (ESR) ceramic output capacitors. The device can produce an output voltage as high as 12V from an input as low as 2.6V.

          Soft-start is programmed with an external capacitor, which sets the input-current ramp rate. In shutdown mode, current consumption is reduced to 0.1μA. The MAX1790/ MAX8715 are available in a space-saving 8-pin μMAX? package. The ultra-small package and high switching frequency allow the total solution to be less than 1.1mm high.

          μMAX is a registered trademark of Maxim Integrated Products, Inc. 
          MAX1790, MAX8715 關(guān)鍵特性
        1. 90% Efficiency 
        2. Adjustable Output from VIN to 12V 
        3. 1.6A, 0.21Ω, 14V Power MOSFET (MAX1790) 
        4. 2.4A, 0.15Ω, 14V Power MOSFET (MAX8715) 
        5. +2.6V to +5.5V Input Range 
        6. Pin-Selectable 640kHz or 1.2MHz Switching Frequency 
        7. 0.1μA Shutdown Current 
        8. Programmable Soft-Start 
        9. Small 8-Pin μMAX Package 
          MAX1790, MAX8715 應用/使用
          手持式設(shè)備
        		10. LCD顯示器
        		11. PCMCIA卡
        		12. 便攜式應用
          MAX1790,MAX8715應用電路
          MAX1790,MAX8715:典型工作電路
          典型工作電路 
          13.            
				
            
                
			
							
          
                
			              
              
            
          
		
          
		
          
		
          
		
          
		
          
			
            
				
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