XL1509-ADJ E1 Buck DC to DC Converter IC (SOP8L Package) The XL1509 is a 150 KHz fixed frequency PWM buck (step-down) DC/DC converter, capable of driving a 2A load with high efficiency, low ripple and excellent line and load regulation. Requiring a minimum number of external components, the regulator is simple to use and include internal frequency compensation and a fixed-frequency oscillator Brand : XL SEMI DATASHEET