AP8375 升压恒压 锂电池 LED背光 驱动

详情描述：

The AP8375 is a low noise, constant frequency  (400kHz) switched capacitor voltage doubler. It  produce a regulated output voltage from a 2.5V  to 4.5V input with up to 250mA of output current.  Low external parts count (one flying capacitor  and two small bypass capacitors at VIN and  VOUT) make the AP8375 ideally suited for  small, battery-powered applications.  A new charge-pump architecture maintains  constant switching frequency to zero load and  reduces both output and input ripple. The  AP8375 have thermal shutdown capability and  can survive a continuous short circuit from  VOUT to GND. Built-in soft-start circuitry  prevents excessive inrush current during  start-up.  High switching frequency enables the use of  small ceramic capacitors. A low current  shutdown feature disconnects the load from VIN  and reduces quiescent current to <1uA. The AP8375 is available in the industry  standard SOT-23-6 power packages. 


 Fixed 5V ? 4% Output 

 VIN Range: 2.5V to 5V 
 
 Output Current: Up to 250mA 
 
 Constant Frequency Operation at All Loads  

 Low Noise Constant Frequency (400kHz)  Operation  

 Automatic Soft-Start Reduces Inrush  Current  

 Shutdown Current <1?A  

 Short-Circuit Protection  

 No Inductors 

 Available in Low Profile 6-Lead SOT23  Package  

 Applliicattiion 


 White LED Backlighting  

 Li-Ion Battery Backup Supplies  

 Local 3V to 5V Conversion  

 Smart Card Readers  

 PCMCIA Local 5V Supplies