1.Output voltage 3.3V/5.0V/6.0V/9.0V/12V
2.The periphery only a capacitor , a coil and a diode. 
3.Max dissipation 1W
4.TO-220-S packing 
5.Working frequency 113K Hz
6.Build-in PWM 
7.Automatic current-limited
8.Mate with VOX serials transmitter IC 

Using for :

——Power supply for USB equipments

——Charging for MP3、MP4、iPhone and mobilephone