It is thin DC-DC buck converter IC, containing temperature-compensated reference voltage source 1.25V comparator Can effectively limit the current and control the duty cycle of the oscillator, driver and high current output switch tube outside with a few components, you can group A DC-DC step-down circuit. Compared with the 34063 product can be achieved with a minimum of external components constituting the switching buck converter, wide Pan for automotive chargers, DC buck converters and other products. AD84068 / AD85063.