ic fr9801, آی سی fr9801 ,

 High Efficiency up to 94%
 Low RDS(ON)
Integrated Power MOSFET
 Internal Compensation Function
 Wide Input Voltage Range: 4.5V to 21V
 Adjustable Output Voltage from 0.8V to 17.85V
 2A Output Current
 Fixed 600KHz Switching Frequency
 Current Mode Operation
 Cycle-by-Cycle Current limit
 Over-Temperature Protection with Auto Recovery
 Output Overvoltage Protection
 Under Voltage Lockout
 <1μA Shutdown Current
 SOT-23-6 Package